I'm not with the police or a lawyer, but I'll list my considerations.
I've had my call on my car via a ham license plate since 1971 and have had no problems I would attribute to that. I've lived in small towns, medium-sized cities, like Raleigh and Winston-Salem (NC), but I also lived in Houston for several years.
But you know, a ham call on your car, like a sticker or a ham license plate, IMO, could mainly be used to get your home address from an on-line ham call database.
What I did to overcome that, is use a PO Box for my FCC address.
I waivered on that. Generally, a person who is a ham has a good job with an accompanying income, so thieves might consider that a good house to break into. They could also note that by visible antennas, however.
Then it occurred to me, a ham's house would be the LAST place you'd want to break into to get jewels and furs and things like that!!! We've spent all of our money on ham radios!! :-)
BUT, upon further consideration and my years of experience being around other hams, I'd say that hams have a greater than average likelihood of owning guns. Yes, some hams are very anti-gun, but in general I'd bet that the average ham would be more likely to be a firearms owner than not.
And guns are what an experienced thief wants to steal the MOST. Stolen guns can sell for MORE than their new price on the underground market. Criminals like to have a gun which can not be traced to them, and convicted felons can't buy guns anyway (most places.)
So that would make our residence a prime spot for a knowledgeable thief to want to hit, and our callsign can lead them straight to our doorstep.
So I have a PO Box as my FCC address. Maybe it's more than is needed, but I'm proud of my callsign, and don't want to have to hide it!
BTW, years ago you could NOT have a PO Box as your official FCC location. When I was first licensed, back in 1968 at 13 years old, my parents lived out in the country, and our address was Route 3, Selma, NC. THAT was not enough for the FCC, they wanted to know pretty precisely where the transmitter(s) would be located. So I had to list my location as on Hwy. 52, 2 miles north of the intersection of Hwy. 52 and Hwy. 15, or something like that.
So that's my take on the question.
73,
Curt W4CP