I think that assessment is a bit harsh. Possibly true in a few exceptional cases, but I think that most of us have less of a problem with a geocache being blown up as with geocachers being blamed for it.
The blame issue is a whole different story. Yes, these incidents are going to happen. It is surprising how few of them there are considering the number of hides.
How many of these incidents have ended with the authorities actually charging a cacher with a crime or for the cost of the response?
Funny you should ask. Check out GC185AN. If you read the logs, the CO tells what happened after his cache got blowed up. He didn't end up having to pay anything, but was sent to collections for the cost of the bomb squad.