There have definitely been times I've made a meme comment and then I'll want to redo either the image and/or the text portion after I post it.
To me, deleting my meme comment to change the image is not a big deal.
Having the ability to edit the comment text, one time within an hour of posting would be nice.
There are some ID numbers that get generated when a comment is added to an image page, those last the life of the comment. Not sure what it would take to change that system for revised comments.
Being able to edit comments more than once or editing comments older than an hour or so seems like it could be abused and tougher to moderate.
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