Some have taken a pro-active approach to call some companies and performers on their BS while others merely sit on forums and complain. A recent post about ANOTHER post elsewhere suggested magicians are cheap bastards (and they are) and if they figure out an effect from the trailer they won't buy it because the EFFECT is the important factor not the handling. Due to that fact trick trailers are having to be "faked" in spots to prevent said cheap-assedness from occurring.
My personal belief is that if your effect isn't good enough to hold up on camera without some tweaking then maybe you need to work on it some more or not put it out at all. Anyone who has been reading this journal the last ten years (Holy crap it's almost been ten years hasn't it?) knows that I will call attention to fake demos. I haven't had to do it as much because others have taken up the task as well and tend to get to it before I do which is great!
However, the fact it still happens just goes to say a lot about our profession. The biggest problem of course is magicians suffer from one inherent flaw... we're still only human. We like to get away with things when we think we can and when we're caught we don't apologize for inconveniencing anyone... it's because we are sorry for getting caught.
Mind you some people straight up refuse to admit to shinanigans when busted but ultimately the reputation damage has been done.
and that might be where the fault lies.