I'm dealing with this right now with two dogs, one of whom does better crated and the other doesn't. My border collie will tear apart a room if I leave, baseboards, carpet, even if it's just for a minute he'll destroy something, anything he can get to. He destroys crates too, but mostly the plastic pans, breaks the pans into pieces, digs the carpet underneath, but I've rigged the crate so that the pan doesn't slide out, and that seems to help. He'll also work on a frozen kong now, which he wouldn't before, so a kong is good for at least a trip to the store.
The other dog is much worse in the crate, tears up the crate but also escapes, vomits, had diarrhea...but the times she's gotten out I've found her sleeping on the couch or the worst was a chewed shoe. I've been thinking of trying her loose, or in a room with my other two dogs, and seeing what happens.
It seems like I'm dealing with two different things though, even though both involve destroying crates, with the bc it seems to be driven by a need to chew, or something beyond his control...I've observed him and he gets this look in his eye, dilated pupils, like he's out of himself...I'm seeing the vet on this one, so I'll update when I know something.
With the puppy it's more like a frantic attempt to escape the crate, and once out she's better, rather than chew chew chew.
I have noticed, and Darkmoon said the same thing I think, that the doorbell sets them off when crated...halloween was a nightmare, and I've been able to pinpoint the doorbell as a trigger on other days too.