My lol's mean diferent things. They can mean, I'm pretending to lol so I dont offend you, even though you linked me to something boring, or the joke you told was crap. It can also mean, lol, that was funny, but I'm not really laughing, just on the inside. It is also good for filling in awkward gaps and last but not least it an be used to mean I've had enough of talking to you, now bugger off!!!, Lol.