It wouldn't make sense to study the effectiveness of a drug in a manner that it isn't administered, so I doubt the effectiveness of it has been studied. (An easier example: no one studies what happens if you drink IV liquids, because they aren't administered that way.) ODT's shouldn't be crushed, they should be dissolved on your tongue. That doesn't stop people experimenting, so if someone wanted to try to make a mint julep out of a Risperdal ODT....I guess they could.
And this isn't credentials by any means, but I've administered these types of medications (ODT) as a nurse, I have a current license, and I've been retired for a long time.
EDIT: I can also tell you that, in real life, if you handle these tablets, they'll already begin to melt because of the moisture naturally on your fingers or even a bit of humidity in the air. They are TINY and they melt FAST.