It's been talked before? Sorry, I'm new here. I think the trick here is not to dump the whole [insert days here] dose but instead dilute it with lots of water then let the solution slowly drip into the aquarium over several days. For example, if you are to use a weekly dose, then make sure that the solution is released into the planted aquarium over the whole week. A simple bottle controlled by a plastic valve can easily do that. As for the concern about health issue, pee is sterile, unless you've got disease, in which case, don't use it. As for ammonia, didn't Diana Walstad claim that plants use ammonia more readily than they do nitrates?
As soon as it hits the air, it's not longer sterile. Much less sitting around in an aquarium- a great bacteria factory. You could DEFINITELY contract something from an aquarium with human urine it it- whether it's your own or someone elses.
Human waste, liquid or solid, is a great way to cultivate all sorts of nasty disease that are much more likely to be contagious to a human than using other sources of ammonia.
There's a reason that sanitation was such a huge advancement for civilization- why would we want to go backwards?