On occasion; one because I usually don't have much to say that hasn't already been expressed, and two because I know a closed shop when I see one.

Many people seem to just want sychophantic agreement rather than have their views challenged or discussed, so there's never really much to contribute.

Copy message to clip board before trying to post. So, if post gets lost you can just paste it and try again.

I usually copy the post I'm answering to Notepad and write my answer there before pasting it to my answer post.
If you use FireFox you can use Lazarus: Form Recovery as a backup. It save me from time to time.

I do it often enough. Or maybe not often enough.

It doesn't help if the opposing side uses emotion/opinion to argue your own beliefs.