Sometimes, you post something on someone else's project, profile or studio by mistake and there is no way to delete it yourself.
Add an option to delete them!
I hope this isn't rejected or a duplicate…

TOLORS wrote:

6. Comments and Text Fields

6.1 Delete or edit your comments everywhere
The inability to delete your comments everywhere is put in place so users do not post inappropriate comments or spam comments on other users' profiles, projects, or studios, just to delete them later on. In contrast, you are not really likely to spam your own projects or profile. The only benefits to this are to remove comments that you did not mean to post and to fix spelling errors. The former could be solved by thinking carefully before posting any comments, and the latter could be worked around by typing slowly and/or stating your mistakes in a reply to the comment. This also applies to forum posts; that is, a feature for Scratchers to delete their own forum posts will not be implemented.

Editing comments could similarly lead to comment manipulation, such as a user commenting “I like this project,” waiting until someone replies with “I agree,” and then editing the original comment to say “I hate this project.” Allowing Scratch Team members to view the edit history of a comment does not make it easy to moderate, since then they have to look carefully at the context of each edit, which takes time

Read the directory before posting to make sure your suggestion isn’t rejected first.

Glad you found an answer! Since this is resolved, I'll close it to help highlight the answer and prevent future responses. If you need it re-opened, though, you can report this and ask.