From my time of running techno nights and helping out at free partys ;).
I find that there is a vibe when it comes to the "techno crowd" this vibe kinda spreds around the club / party and helps send the message to any idiots that whant to kick off to not bother...and get with the program or leave!
The way i see it is in most areas its mostley about a group of people all in one place to enjoy each others company and TECHNO. they make up the backbone of the party scene and they help keep some kind of order at the partys. everyone looks out for eachother.

BUT as we found out last summer when myself and some close party freinds where attacked by a mad man at a outdoor party not everyone goes to the party for a good time! after the attack though i still feel safe at partys becuse of all the people that surported us after the attack in bringing the man to justice (even the justice he finally recived was nothing compared to the harm he caused). This also was just one lone idiot who was out to reck a good party.

we do have something good in the techno community which is worth keeping....a good vibe! we must not let the minority of idiots at events spoil our fun!