re: Are dash cams worthwhile?

It has saved my arse twice in the last year. Back in February I was leaving Portlandon i84 in some light snow, California driver next to my trailer lost control and spun out into the side of the trailer. She tried claiming that I swerved into her causing her to lose control, dashcam showed otherwise.
Also, just a few weeks ago, I got sideswiped by a douche trying to cut me off when his lane was ending. Tore up the side of his vehicle because numbnuts didn't clear then front of my truck. He claimed I swerved into his lane and pit-slammed his truck. Dashcam proved otherwise.
Dashcams are 100% essential gear in semis now because the public is full of idiots trying to sue for their own incompetence.