Don't LOL if you aren't L'inOL.
Halo: Reach
Halo 3
Halo ODST
Depends. I usually just type out the swear word and let it be '-blam!-', but sometimes '-blam!-' can ruin words that end in 'ing' or 'ed' and so your sentence doesn't make sense. When that happens, I write it out like '-blam!-ing'.