All of this spam was created a long time ago when the site was more vulnerable. The wiki has been locked down since then, and this should not happen again (but some get through).
I deleted the first list of pages you mentioned. The uploaded images are tedious to delete because there no simple tool I've found to do it on a mass scale. Since they're not linked anywhere then they don't do much harm except use up server space. It seems you have time. So I will connect with you directly offline to give you some rights.