I think it is normal to be at least a little attached to threads you author or post in. I imagine most people dislike their threads being deleted regardless of a bipolar diagnosis. I wouldn't say I get wrapped up in it, but there is a sinking feeling when something I wirte offends another or is criticised.

I do wish there was a deleted thread notification though. It would be nice if the moderators could leave a little note to educate you as to why they removed the post. That would help to avoid repeat offenses and give people who are manic or depressed something to consider when they are feeling balanced again.