I edit my posts whenever I spot a typo, be it spelling or grammar. Doesn't happen too often, but more than I'd like, if I'm posting in a hurry.

However, as a job-perk of being a mod, the "last edited by" thingy doesn't appear when I edit my own posts, or someone else's. Since most of EoFF is kind and rule-abiding, I rarely have to edit another person's post to delete spam, flame or profanity.