In general, everytime someone types "LOL" (caps or not), I imagine some solitary twerp cackling maniacally to himself. When I see "ROFL", I get a vision of some truly deranged person seriously in need of a straitjacket. I think the world would be a better place if there were some legal enforcement of these acronyms-- that is, one would be subject to fine and/or imprisonment for typing one of these without actually being engaged in the act described. Then you might actually see more usage of MA (Mildly Amused), CS (Chuckling Slightly), or WIHBDCWRT (Wish I Hadn't Been Drinking Coke While Reading That).