I don't have a dick so I don't have any personal experience on this, but do people actually do that? I don't want to chat with randos if we're not at a party or something, much less when I'm pissing.
There is no better place to spread the good word of Arch Linux than a gas station bathroom. I also let Mormon evangelists into my place just to show them how great Arch Linux is.
Penis-possessor here, so I am obviously an expert: I only ever have it happen to me at the sink or when it's someone I know like a co-worker (I hate it when that happens).
I've had it happen quite a lot, mostly by overbearing co-workers and people at a bar/club. There have also been a couple times where older men will start talking to me at a urinal in a gas station or something. I agree it's weird behavior. Not sure what's wrong with these people.