Well, there is absolutely no need to have to tune exactly to the freq anyway.
And even if there were, these idiots are very often tuning on the DX station's transmit frequency while the DX station is working SPLIT.
I don't advocate tuning up in the middle of the pileup either, but it's what you should do if you have an irrational compulsion to be tuned up where you're going to be calling
Sadly, all the solutions to this problem have to presuppose that the person doing this is actually capable of recognizing that they're causing a problem. That's really unlikely.