Every now and then when I go to a hamfest I'll see a plethora of vehicles in the parking lot that look straight out of science fiction, what with antennae all over the trunk, the hood, the top, or somewhere in between. They are affectionately called "porcupines" in many circles.
Then there's this guy...
Sometimes I'll catch a porcupine on a web site or two, here's one from People of Walmart:
A Google search yielded this beauty:
|How do you even SEE out the window?|
I think the most antennae anyone I personally knew had on their vehicle was 5. I myself had 2 at the most. Actually, 3. My old pickup truck had a 10m stick on the back bumper, a mag-mount 2m on the top, and a dual-band thru-the-glass mount for 2m/440 (which never tuned correctly).
My philosophy is that if you need to have an antenna on your car, have a radio to go with it. If you have so many radios that people can't get in the car, then you might have therapy in your future...
But seriously, some do go overboard with their passions in life, but as long as it's safe and responsible, then by all means have at it.