Only going by my knowledge from my former job where VERY seldom it was determined that this type of wall wart caused whatever it was powering to fail, but it did happen. (I would say about 10 times out of 100's of problems.) If the powered equipment was well designed, it usually had a crowbar or varistor-fuse combination that would save it anyway. I have even seen a few times where a transformer type got so hot that line voltage ended up on the output.
I run all my base radios from a 12v deep cycle battery kept charged by a Altronics 10 amp
power supply/charger that powered an access system in a data center that was remodeled.
When I get it close to being programmed like I want, it's going into the dash of my Toyota pickup, so maybe I will sacrifice the wall wart and see what's in it----