Ten years or so ago, we had lots of problems with the straight edge crowd. Without painting with a broad brush, SE kids were constantly starting fights and pretty much known for being a bunch of violent little dicks. They could have benifitted from a drink or a joint, or something to get them to calm down. It got bad enough that we bared them from venues and stopped booking bands that appealed to that group, because they drove everyone away.
That being said I haven't heard much about the whole straight edge thing in years.