By LA do you mean Los Angeles or Louisiana? Scantily clad women passengers looks hot, but is the ultimate in stupidity, more so when splitting lanes.
Personally I hate the group riders that take up multiple lanes on the freeway (sometimes the whole thing) cruising slowly and, more often than not, doing wheelies, etc. I really love bikes, but stuff my ass doing 45mph on the freeway behind a pack of them, and suddenly all I can think about is plowing them over.