None on the list have really ever troubled me. There's a different type of fan I totally hate with passion - pretentious, elitist snobs who only listen to jazz and classic progressive rock, and unable to tolerate ANYTHING else, but love to point out how everything else is crap (for some reason metal is usually #1 priority to flame, and whenever I've seen them do so, my brain was near exploding due to extreme overdose of ignorance), with absolute confidence that they're above everything else.
Unfortunately, Porcupine Tree has a fair share of those, the "burn everything released after Signify" group is made in like 95% of them.