To both, these reflect unsportsmanlike conduct, but not bannable IMHO. If anything, the really unfair behavior is the lopsided splits by the server...and we can't punish those...
The first case, common and yes, slimy, asks mods to split hairs as to what is or is not illegal camping...an issue we all know is wildly debateable. This is like the debate over bomb dumpers...positions are all over the place.
As to the second, how can you police this? All they have to do is nose in and they've got a quick ticket back for a new bomb. Either way, they're taking a "crash" just for an unfair advantage. If scrounging a few points is that big a deal to them, their issues go far beyond gaming a digital environment. Hopefully, thay can learn that reputation does count..in life and in this game. Play like a shite and folks will treat you that way...This would include tanking in 6-0 BTC games...c'mon, take the bombing practice or quit the game. I have seen too many of these that reds will finally appear, but there is little point after some tanker has plinked off 90%... Save it for a competetive game... Again, IMHO.