What do you think about BalCalcMod? It lets you lock your gun elevated for a given distance, and thus actually hit moving/unspotted tanks on top of ridgelines, instead of launching your shell into the orbit. It's been part of Aslain's for ages, now on the official mod portal. This means it's perfectly legal, yet it somehow still makes me feel dirty whenever I think about it.
(Also, hi WoTLabs Forum! I've been lurking around here for years already, before this quality post finally made me actually write something...)