When exactly did Rol start being "sarcastic"?

[theprof00]

RolStoppable said:

theprof00 said:
But whatever, now I am off the subject because I am in argument with 4 of rols trolling accounts.

Back on topic, I've read Rol's posts from before because I know he is an intelligent guy. But I think he gets tired of us sometimes and gets cranky.

Examples of cranky posts, please.

Oh cmon rol this is all in good fun. I'm merely suggesting that some of your earlier posts seem very neutral and then now they are all sarcastic. I'm just wondering how that happened from the people that have been here to see it.