The numbers are intentionally not friendly, because it's designed to deter freekillers; if a player has to wait a measly 5 minutes before doing as he pleases, they'll wait. However, if he has to wait much longer, chances are he'll either forget the idea or just leave.
That's the average age for a PB player . Regardless, you're absolutely right it'll never change if older people don't come on and take charge, and they unfortunately share your mindset.
Nothing is currently set in concrete, the times can be raised or lowered, as for the tips more will definitely be instilled to the server.