After all the heavy, divisive threads the last couple of days I thought I’d ask opinion on this. A bit more light hearted... 

Now I was told it was started with the Gordon Brown thing yeas ago and evolved to mean different things, such as, taking the piss with the comment, taking the piss with the thread (aka a troll), it’s not real or it’s that far fetched that it’s not worth a reply.
Some people seem adamant it’s never used to suggest a troll thread.
So can someone tell me, are they wrong? Do people use it in that context?!
YABU - It’s never used to suggest a troll
YANBI - it can be used to suggest a troll
Happy voting!