I’m going to assume, for the moment at least, that this is after serious answers. If you’re more interested in justifying your own behaviour and/or picking on others - ignore this post because it frankly won’t address that.
You need to be a lot more specific. Come together for what exactly?
If you mean come together for creating & helping each other with art, check out the Art & Help forums (as per Fweeb’s suggestion).
If you mean come together for creating games - that’s a whole different ball of wax and has much less to do with these forums than you seem to think. Check out the Game Engine forums and start any/all discussions about forming teams under the assumption that everyone has their own idea they want to work on and, at least to them, it is better than anyone else’s. Ideas are a dime a dozen, you need to be offering more than ideas to attract a team. (Money often helps ).
Well, going to assume here you mean responses to your recent posts specifically, given you provide no other context. The answer to that question is something you would likely regard as a “negative response”, so skip to the next quote block if you don’t want to actually hear the answer.
Quite frankly, the main reason you get negative responses in the threads I see them cropping up in is that you bring up the same BGE claptrap in every thread no matter what the actual subject of the thread. This is rude, it’s annoying, and you’ve been told by pretty much everyone (including mods) not to do it. One should expect a “negative response” to doing something that’s rude, annoying, and you’ve been told to stop.
I guarantee that you halve the number of posts you make about the BGE outside the game engine forums and you’ll easily halve (or more) the number of negative responses you get.
As I understand the (somewhat ambiguous) terms you’re using - you can’t.
“Dark trolls”, if I understand you correctly, are those that post negative flamebait just to get a rise out of others. You can’t make them into good posters - they have to decide that the negative attention they get from posting their vitriol is not worth the effort of doing so. Best you can do to these guys is to ignore them. There is a reason some folks are on my Ignore list - it prevents me from giving said “dark trolls” a knee-jerk response.
“White trolls”, if I understand you correctly, are those that are write posts that annoy people but do so not for the negative attention. To some extent, you cannot change them much other than to get them to post less on the subjects that interest them.
For instance, let’s take you & I as examples of “white trolls”. You post about the BGE incessantly and it annoys people. You are not doing it for the negative attention, but spamming about the topic still derails threads and annoys other posters. I have a bad habit of not shutting up about subjects/issues that the Blender Foundation wishes would disappear. I’m not doing it because I want to rile people up or cause trouble, but bringing those subjects up all the time can derail threads and annoys other posters. In both cases, the solution is not to give up on the subjects that drive us, but to better choose where we discuss them (and how often). Make sense?
If you are asking how to get teams to come together, I’ll share a little bit of advice I got some eight years back when I was discussing the subject of getting people to come together and work on indie game development (another forum).
In the arena of indie & hobbyist work, there are two ways to ensure you get a partner to work with - you pay them or you give up on your idea & work on theirs. That money (upfront) will motivate people to work together should need no explanation but the “giving up your idea” thing took me a little to understand.
See, everyone on the forum willing to work on a game, movie, series of plastic toys, etc has their own ideas they want to work on. If those ideas are too big to work on by themselves, they want a team to work on their ideas. It is very rare you’ll find a highly motivated & skilled artist (let alone programmer) who is willing to just work on whatever someone puts in front of them… and those rare ones are snatched up quicker than you can blink.
So how to handle the fact that you have two hundred people with three hundred conflicting ideas they’d like to work on? You convince them being in a team with you is going to get them what they want. Start from the basis that others will be as eager to work on your idea as you are to work on theirs. That artist with the really stupid car game concept is just as thrilled about that awesome mafia platformer you want his help with as you are about his concept.