This has been touched on in these forums before. It is not bad sportsmanship to try to make your opponent lose on time. The clock is one of several tools that both players have at their disposal, and they are both well within their rights to use it, especially when one player doesn't manage his clock all that well. If you didn't like running out of time, then play with longer time controls next time; it's a learning experience.
I doubt that this is seen as bad form in Britain, even, because--again--this has been discussed before, and that has never come up.
I find something interesting, though. You came to the forums to complain about your opponent (and gave his real name!) running you out of time because he was supposedly rude. Then you go on to proudly say that you exacted your revenge by running him out of time. I know the circumstances may be different regarding that second game, but on the surface, it sounds hypocritical. Also, you should keep anonymous the names of players you're upset with, and not use even their usernames, let alone their real names (if they're given).


i played a 5 minute game today against burton greenwood of spain i think.after attacking for most of the game all major pieces were swapped off leaving a totally drawn king and pawn ending.after playing a few moves i offered a draw but surprise surprise due to me having less time he refused and played umpteen pointless moves to simply run me out of time.i dont know about chess etiquette anywhere else in the world but in britain this would be seen as extremely bad form to simply run the opponents clock down.i won the rematch(on time ha ha)in a won position but would like to hear other players views on this.