Just a point of information.....Is no one allowed to express happines or positive feelings about the fact that the show was cancelled. I mean its clear that the show was not popular. Is only one perspective permitted on this issue?
Such discussion should probably be taken to MA, but I'll take a crack at this.
I would guess that saying "Thank (list of deities)." is considered trolling because it's not adding anything to discussion, nor is it really expressing an opinon. It's something said that will likely spark debate and anger.
Now coming in and sayin, "Well, I'm not too upset. I din't like Enterprise because it was boring and uninteresting." wouldn't be trolling because it's expressing an opinion thoughtfuly in the spirit of discussion.
World of difference between the two.