To be honest, I don’t think this is a big problem. I have wanted to edit my comments only a few times, because of the following reasons:
1) I noticed a grammar mistake. I’m not a native speaker of English but I don’t think this is such an issue for those who are.
2) I messed up the formatting. 1. Some time ago I didn’t know anything about tags yet and probably there wasn’t enough information as for which codes are allowed on F1F (but there is now and there are buttons for those, too). 2. I recently posted a very huge forum topic with probably 100 tags that I had added automatically but I don’t do that outside the forum.
3) Once in approximately 500 times I managed to press the ‘post’ button accidentally before I had finished what I wanted to say.
All in all, I don’t see strong reasons for having the ‘Edit comments’ feature outside the forum. It’s not like we need to write school essays, official reports that our bosses will read or something else that important here. We are allowed to make mistakes now and then, noone will punish us for them and nobody will laugh at us because of them (and, if someone will, then F1F staff will teach him a lesson). Just look at the tweets of our beloved drivers. Lewis Hamilton once confused search box with tweet box and Heikki wished merry Xmas to all his computers, why should we fall behind by being perfect?