I do that aswell!
The bmx scene here is full of mixed people and the good thing is that doesn't matter how good you are we all ride together whether your 13 or 30 can only do 180 or your flying down stairs throwing barspins it doesn't matter we still have fun.
The trend thing is true everyone seems to copy eachother with clothes and parts over here too practically everyone that rides bmx has skinny jeans, a really big t-shirt, colourfull nike trainers and one of those flat visor cap thingys sometimes I do think that they looks like twats but cos they ride bmx they think they're cool and don't care but everyone comes from different places and are all different even if they do dress the same.