modifying user comments

Hi. When I modify a user comment I tend to not leave an "editors note" but rather rewrite/improve their comment and leave it as their own. I prefer having strong comments versus weak (usually very lengthy) ones with an attached editors note. Either that or I just delete the not-so-useful comment. Example, a user had something like "unlike PHP3, in PHP4, quotes are automagically escaped" when really they don't realize what magic_quotes_gpc is. So, I modified it. Same with some nasty code people leave, etc. Anyone have words to share on this topic? Should I be leaving editors notes instead? I see many of you do. Regards, Philip Olson