I tend not to see "trolls" under every bed catspaw, it makes for lazy thinking.
I fact I dont think such an animal exists, the word is commonly used here about anyone who does not fit into the popular mould...or whos arguments are difficult to oppose.

We Scots are supposed to be "clannish".....but we have nothing on the Mudcat "liberals". :0)

In my case being anti "liberal"...certainly does not mean politically conservative.