cars do not afford the whole "privacy of one's own" thing.
all we need to have is some sort of polarized something or other type of window glass that won't allow tv light to show thru it, and we're fine.
but people arent allowed to watch pornography on a big screen tv on their front porch, they shouldnt be allowed to watch it in their car either.
anyway it's a matter of respect more than anything else. and if you're going to be an asshole, we should be permitted to kick your ass.