Do you mind if I ask,.. Why does the "last edited" line bother you? Is there something you feel it says about your post? Some negative impression you believe it implies when it announces you've edited your submission?
I'm not raggin' or being sarcastic. I'm just genuinely curious cuz I never even thought about it. It's there, it's not there, I barely notice it on my own post's, I can't recall if I've Ever noticed it on anyone else's.
When I edit a post and it shows the little box, it makes me feel like people think I changed my mind after reading other comments, which is never the case. I just edit when I notice grammatical errors.