An immutable law of social science and public law in every modern country and known since the first Noel or Christmas...so,pay heed,Pope and pauper both!

 A wanderer  between sky and cloud will walk up to you or call at your door sooner or later as Judas did to Jesus in the Garden of Gethsemane.

Otherwise,he will find some way to inveigle himself into your company and circle of acquaintances to find out about you so that he can report back about you or  have you beaten up,arrested or killed.

 Note especially the case of the said Biblical Judas. He will claim some connection to a security firm,police,army or judgement enforcement agency. 

He has no links in the sense of family or kinfolk or official officeholding to any of those bodies or government agencies. He is a weak sort of person,a candle in the wind, someone motivated by purely selfish interests.

 He VOLUNTEERED for his role unless he was a sexual recruit or a child informant or is being blackmailed by police.

He has profited illegally from public charity as Judas profited from the alms of the Apostles from which he stole (the Gospels).

He borrows from you but he never pays you the full measure of what he owes you. 

....

The 'home visits'

He will try to "make out" that he is "acting out of the goodness of his heart" by visiting and that your unpaid work "benefitted many". 

His superior in this game of bluff will describe your main debtor as "a charity".

 Your "friend" was the sole beneficiary of your endeavours. 

He has repeatedly broken both the governing civil and CRIMINAL law. Nobody knows that fact better than he does. He is obliged to play "the wise guide" and "friend in need" to hoodwink everyone. 

In his heart of hearts, he knows that his ultimate destination is prison or a place of confinement or premature death in suspicious circumstances.

After his passing,he will soon be forgotten. He passes away quietly after a slow but painful illness. That could easily have been avoided if he had sought to repay you or tried to get medical advice in good time.

....

When he comes to your house with someone else,he intends to beat you up. Both have betrayed people to the police. That is their self-appointed function in society.

His enquiries concern the political views of his "host beast" and that receptor's private opinions and personal life. 

The paid police informer thinks that he can avoid final retribution  by engaging his victim in a "merry jaunt",a game of chase or in other fatuous nonsense such as a quiz.

His character? The moral of the story? Religious festivals?

He is a curmudgeon,a dog-in-the-manger type who always appears at Christmas or Easter to have his target killed. That is when Jesus in the biblical epic was threatened and an anti-Christ,an informer,is ultimately informed by biblical precedent.

He arrives at your door unexpectedly. He never seeks permission to enter or use the toilet since he intends to piss on your bathroom floor.

In the end,he goes to jail or dies by suicide because "Numerous people have their knives out for him". 

He is not interested in politics but claims that he votes. He lies about how he casts his vote as will any police agent who is paid directly or indirectly from public funds.

....

When he phones and you want him to hang up?

Say to him,"I will let you get on with what you were doing before you called me." 

The country response to this "wiseacre" was, "Good luck to you and don't come back because you're not welcome here."

 The Lallans response? 

"Bad scrant to you!" 

....

Informers in the Six Counties are drawn from former policemen and from former UDR and members of the loyalist and Masonic community,both Catholic and Protestant.

...

One variety of persistent late-night nuisance, the repeat telephone caller,is such a fickle friend. He is often a man of some property and the prescient ambition to acquire your tenancy or house, a glorified beggar. Often, he has been imbibing strong liquor or taking what he refers to as "medication" and talking to his police "handlers" beforehand. He does so to receive instructions on what the police wish to learn from you,usually your political views,partisan loyalties or voting preferences. 

Some forms of police activity merely involve political "focus groups".

....

A real spoofer,an informant,works solely for the Gardai or police.

That sort of agent may appear as an election canvasser to seek your endorsement for someone who he hates with a vengeance someone such as Phil Flanagan or Seamus Treanor. 

You will see that type of police informer "hanging around" a library or somewhere in its environs.Political intelligence gathering is centred on libraries,not police stations. Undercover policemen and political spies rarely visit their local police station.

...

A quick follow-up? The reply?

Say,"Skat!"

Say to late night telephone callers,

" There's no need to call me again at this time, particularly so late at night and so unexpectedly. If you call me again for any reason, I will report you to the police or my solicitor for giving information about me to plainclothes policemen. I have asked my solicitor to contact a responsible member of your family. In this country that's your mother or sister,not your father because he was a police informer as are you. Your sort of activity runs in families."