This is what I think the difference is between trolling and expressing an opinion:
Original-Poster: This is a new Amiga related project I am working on. It has feature X and it can also do feature Y.
Positive-person: Great work! I'm glad you have taken the time to start this project which is something that various Amiga users may find a use for and enjoy!
Not-a-troll: Looks okay, can you add feature Z as well?
Another-non-troll: Have you considered compiling it for my Amiga-like OS of choice? I would use it if you do. Keep up the good work!
Troll: I have no use for this (because I don't use an Amiga-like system at all), so why are you bothering to make it?
Another-Troll: Pfft, I can do that on my iPhone.
Troll-Feeder: Where can I download the iPhone version from?
The trolls are pretty consistent, they will continue to post cheeky or cruel remarks at any chance they get. They prefer to start a fight and back out of it while others join in and continue it, or take a stab when they feel there's no chance of retaliation. I have no problem with cowards like this being removed from the forum.
I'm sure the moderators don't regard passionate, opinionated Amiga users who like to debate about their favorite platform as trolls. I think a lot of people are getting upset about something that's not going to affect them in any negative way, and in fact it could be just what we need to get more Amiga-related discussion happening on this site. I know for a fact, from chatting to hundreds of Amiga users around the world on IRC, MSN and through forum private messages, that there are many people who would post a lot more often about Amiga-related projects and ideas if they weren't afraid of having their thread derailed by someone whose only intent is to crush their spirit and stop them from wanting to go any further with their idea.