"Probably give 'em a wide berth from now on."
Well that's the thing.
99% of the time going through a car wash will result in the outside of your car being cleaned and nothing else.
Unfortunately there is no sign on them that lights up saying "Now under remote control of homicidal nutjob, get out" for the other 1%.
Making the whole process a lot more "interesting" than most people would want it to be.
Depending on how widely this is reported in MSM this could do a lot of damage to the mfg reputation.
Which, given they had this information for 2 years, would be well deserved.