I want to get to either rewrite all my old reddit comments or delete them (prefer to rewrite them all to an insulting message to reddit) before all third party apps are effectively removed on 01 July.
I vaguely remember there was a way to do this.
Does anybody know?
I would encourage you to do the rewrite manually. Don’t do every comment, just some of them. This will enable you to edit them in such a way that the comment becomes horrible, but done in a sufficiently trolly way that it is not immediately apparent from skimming it.
If you do this over a period of time, they will not have any easy ways to undo it, by say, rolling your account back to some previous backup or something. They’ll have to invest manpower energy to find exactly where to draw that line. Energy they do not have.
I would do that but my account is like 10 years old and probably thousands of comments.