Old boats, I mean boats at least 40 or so years, historically had their heads on the port side. It was a tradition based on the fact that you could count on the head discharge thru hull coming out that side and therefore you always went swimming on the starboard side. A place like Great Salt Pond on Block Island, with a narrow inlet and hundreds of boats inside could get interesting on crowded occasions, such as the early Block Island race weeks or St Georges Harbor on Bermuda when the racing fleet was in with eight or more crew aboard each boat.
I'm glad that some of those problems have been rectified but I do pee over the side much of the time unless I am in a marina or in a very restricted harbor. And most people do too. And if I'm spending a day at the beach and there are no toilets handy I pee in the ocean there. Not in a lake or in a pool, but if I'm looking at three thousand miles of ocean to Europe, I do what come naturally. And I'm willing to bet most people reading this have done the same. I also fill the jug on my composting toilet when in restricted waters and dump it overboard when far enough offshore - sometimes my navigation is a little fuzzy about what three miles really is. Why, I think I even peed overboard when only two miles offshore.
I thought of the funnel to an unused thru hull idea myself. I remember an old two engine Navy prop cargo plane nicknamed the bugsmasher (I don't remember its proper name). They had just that system. You went aft and pulled a funnel connected to a hose out of a locker and peed into the air. That's about as bad as peeing in the water isn't it? I do think that peeing overboard in rough weather is unsafe so I'd like a funnel connected to the water so it can be used when bouncing around in the ocean, without filling up my jug, which can be messy to empty in rough weather. I haven't done it because I haven't figured out how to do it with adequate safety for water coming in, not pee going out.
A little common sense goes a long way. Don't tell me that peeing in water a mile off the beach is the same as peeing in your cockpit, that's nonsense. But don't tell me you secretly pump out at night in a crowded harbor, that's uncivil as well as blatantly illegal. As I said before, come on guys, a little common sense and sense of proportion.