Sorry for the mess!
I deleted a bunch of spam topics. Our movie-loving spam users seem to be drawn to "Off-Topic", at least spam seems mostly contained there. If anyone feels he / she is up to the task to help me moderate this site, please apply via PM. I'd be happy to hear from you!
I will look into options to better protect this site from spam in the future. Current software is unfortunately outdated, so my current options are very limited other than moderating this site much more strictly.