If you continue antagonizing people with your fake dupe claims and have a large proportion of your posts flashed, there's a chance that the entire account gets

If you continue antagonizing people with your fake dupe claims and have a large proportion of your posts flashed, there's a chance that the entire account gets shadowbanned. And then most people won't see the subset of posts where you have a legit point either. A small number of reposts is not only permitted by the rules of the doors, it is very often explicitly encouraged by the mods. Railing against that is really not productive, especially since those reposts are often some of the very best posts to the site.