There's already enough questionable images up there that I don't feel comfortable sharing this with my company.

(Author here) That's certainly something we took into account--we're using some AI methods to largely automate content moderation (Google Cloud Vision, in particular), and we also have to capability to turn on a moderation queue if it becomes necessary. Aside from that, if you spot something inappropriate before we do let us know at hello@zoomerbackgrounds.com!