I think the problem really rests with this statement. Sure, trolls will go to a motorcycle forum and bash cycles until they get attention.
But the issue with MR is more like a cycle fan talking about how he doesn't feel a Harley meets his/her needs and wants an Honda; then said Honda rider gets trashed by Harley riders.
Or more to the point, how a user can have a validated opinion about a product but still come under fire from both the users and at times the mods because it doesn't fit with their own perspectives.
Unfortunately trolling isn't as simple as some may want it to be. A troll can and has many times on MRs, shown itself to be anyone looking for an argument. Even if it's on a topic that the thread talks about.
For example, the optical disc drive or Blu-ray conundrum brings forth FUD from both sides, and no real educated debate.
The iPhone / Android bag of hurt will always be the same, but again, you have users that say good things about Android, and users that bash/flame/curse out/etc. those users because of their opinions.
To the OP, it's more about ignorant users more so than "Apple Haters"