I tried this (a long time ago) using Greasemonkey, it worked fairly well for tens/hundreds of posts, then I must have triggered some invisible rate-limit which

I tried this (a long time ago) using Greasemonkey, it worked fairly well for tens/hundreds of posts, then I must have triggered some invisible rate-limit which prevented me from continuing. I don't think I ever tried again, I just started a new fresh account for close family.