I Warned You
as tanks developed armour too thick to be penetrated by even this large, powerful rifle, its uses switched to fields such as long range sniping, tank harassment and an improvised anti-aircraft weapon.
via Lahti L-39 - Wikipedia, the free encyclopedia.
I'm well aware that I'm already straying from the suggested topics I outlined in the Problem Statement, but then I did warn you. I sort of feel like Tim the enchanter from Monty Python and the Holy Grail saying that.
Anyway I was talking with my friend Pete a rather gunny person and he sent me a link to a photo of two guns. Now this isn't a very strange occurrence between Pete and I, except that he immediately said "the one on the right is .50BMG" which sort of produced a jaw-dropping effect because the gun on the left was a good 3x larger than the gun on the right. Sure enough it was a 20mm rifle which you may have noticed from the quote above was used in the second World War. I read the wikipedia article on it and found a rather amusing statement that once tanks evolved to become resistant to it it was used for "tank harassment" which I found hilarious.
I'm trying really hard to think of any other way you might "harass a tank" but I can't come up with any other way short of destroying them but that's a lot less harassment than it is destroying which I suppose would still be irritating to those inside. Either way tank harassment doesn't sound like a very fun activity not like cow tipping or other mischievous acts would be.

