Bad Sportsmanship / Being a 'sore loser' - How do you deal with it?

[Haunted Water]

Well, noobtubing comes from me playing inFAMOUS. Their logic is "Oh, Cole (the protagonist) is five feet from me. I have this here RPG... *fires*" I'll be sitting there for a second, then...
FFFUUUUUUU--
The other two just come from Hallo Reach online.