You can easily delete your own comments.
For several reasons I tend to be reluctant when it comes to editing other people's contributions. For example, I don't want my name "stamped" on a great answer that someone else put a lot of effort into, only because a small but nevertheless relevant typo needs to be corrected. For example, I don't feel comfortable being perceived as someone who likes to censor. Sometimes the question whether an edit is needed actually is a matter of opinion where I think that the decision should be left to the one who wrote the contribution.
So, instead of editing other people's contributions, I sometimes use comments to draw the attention of senders of answers towards typos in their answers which for the sake of clarity should be rectified. E.g., when the name of a TeX- or LaTeX-parameter is misspelled, or when inadvertently/by mistake the name of the wrong parameter or the wrong digit behind a hash denoting a macro argument was typed which a novice might not realize. Things which might cause problems/error-messages and the like, but which probably are not that obvious that a novice might realize and correct her-/himself.
Such comments are obsolete as soon as the sender of the answer/the addressee of the comment has rectified things in the answer. Therefore I'd like such comments to be markable as "deleteable by the addressee".
Sometimes I just want to bring something to the attention of the addressee of my comment whereby I think that keeping the comment on the site is obsolete as soon as the addressee took notice.
What do you think about a "mark the comment as deleteable by the addressee" feature?
Could a feature like this be misused for evil?
Did I miss that there already is a way to be automatically notified when a specific contribution is changed/edited? (You could use this to monitor whether comments you have written become obsolete due to edits in contributions. In such a case, you could then delete your now obsolete comment yourself.)

