Reporting posts from 2018 in dead threads that have already been locked really isn't necessary. Sometimes it seems like people are going out of their way to find stuff to report. Posts that have been edited in long-dead threads shouldn't be removed anyway as someone can just edit their post and then report it to try make sure it's fully deleted and people can try cover their tracks this way. There probably should be some sort of statue of limitations on certain stuff because posts in dead threads from years ago really isn't an issue. If you want to report stuff there's thousands of posts made a day by shitposters so it's not like you'll ever run out of stuff to do.