Rental cars are not any issue. I just bring my EZ-Pass along and stick it to the window for the duration of the rental, problem solved.
Gunrunner;
I tried that several years ago (in NY) and got a ticket since it wasn’t attached to my registered vehicle - have they changed that rule???
Apparently, when we bought new cars, they didn't even bother to collect the information about the cars, so none of mine are registered to the correct car, we don't own those cars now!
That's all well and good if the place you go is EZPass and not something else! I don't imagine it would work too well in Florida, since theirs is called Sunpass and it's not just a nameplate on the same transponder for the same system, to the best of my knowledge, it's a different system. (even if it is the same transponder, it won't do anything if they don't have your transponder number in their database as a valid transponder # )
I also recall them not liking swapping EZ Passes between cars way back when in PA (maybe 15 years ago or so). At the time I had 2 vehicles I would alternate driving, and when I didn't hold the thing up quite right one of the times I went through with the new car they had no knowledge about, it required a phone call to straighten out. I didn't get a ticket or anything, but it required attention.
I think you are right that now they care less than they used to (possibly when all the plate reading stuff got added when they eliminated cash booths at some places.
Also, when the thing eventually dies, you start to get what's called a "V-toll" that they process based on your license plate (sorry, "tag" here in PA - I never did get used to that ) Those are not cheap (unless you travel far, then they are possibly cheaper at $5 a pop), so you want to keep track of your account somewhat regularly if you frequently use the toll roads. I was refunded all of my excess tolls, but I had to manually enter a bunch of requests on line saying each was my daily commute. this was probably within the last 2 1/2 years or so.
-Dave