The thing with some of these themes is let's say it's Acoustic Drums. Well, some might do that and then add other stuff to it so you can't really tell if they're acoustic or not. Some will just ignore the theme. Some will vote for whatever beat regardless of the theme.
I find it's best to be more general with the themes like Rock, Jazzy, Guitar, etc.
I'm sure some of you remember the "No Drums" fiasco from years ago.
In the past some people would submit a beat without following the theme and I'd email them and they'd either not respond, or would say that it does have guitar in it or whatever. So now I just put the beats in anyway, hoping everyone that votes knows not to vote for the beat that doesn't follow the theme.