It's up to you.
Some people don't like when people delete threads, but it isn't actually against the guidelines in the FAQ.
(
Redsushi! Whoop! Whoop! Yes, that one!,
Tue 3 Nov 2009, 18:40,
archived)
That's ok.
It isn't the end of the world, despite the way that some people may react. Just don't do it again :)
(
Redsushi! Whoop! Whoop! Yes, that one!,
Tue 3 Nov 2009, 18:45,
archived)