I am pretty sure the whole situation with Donating is that lets say a minge donates, and they are later banned, they will get all bitchy about how they are banned and they donated and it isnt right because they donated and etc. That, and because on a whole, when some people donate, they automatically expect extra rights and special treatment. Its not right.
I'm not saying any of you would do this, however some people are shitty like that, and adding a donate section would cause those sort of situations.
However, I too would happily donate to PNRP, which is by far my favorite server. Maybe Eldar and Lost would accept donations on a more private way, such as if a friend would mail them something or etc. But other than that i personally think adding a public donation area is a bad idea.