What makes people auto assume that a post is a troll post?

*Extreme, one-sided views on hot-button issues - usually political.

*Posts criticising or defending a person or body that represents ONE SIDE of a hot-button political issue (in order to get people to attack or defend it).

*Needlessly explicit, sexual stories with no apparent question behind them.

*Almost anything scatological, or about fetishes.

*Random harmless but inane posts with no point or question attached to them.

*Anything written in language so densely erroneous that it's not even trying to be intelligible.

*Anything that produces a 'gut' reaction of outrage because it is so unusually repulsive that you question how many human beings in the world can statistically be like that and thus start doubting that this OP is the Real McCoy.

*'Meta' troll posts designed to send up the trolls.

*Most posts with the word 'cock' or 'pussy' or 'ass' in them.

I could go on...