No, they were specifically complaining about Customs. (And there are threads online about issues with similar incidents, if you use google - specifically about lack of reimbursement for damages.) My friends have not had similar experiences with the Coast Guard.
I have some friends who were former Customs aviation, and I suppose I could ask them, but I doubt that a) they'd discuss their tipping with me, or b) they'd want me to discuss them in this (or any other) forum.
But my friends that ran into issues were returning from trips to the islands, in large (38' +) sailboats. This was Florida, in the 90's, so who knows?