I replaced Google Ads by something else, as it will probably take time until Google unbans the site, if it does.
It is still worth searching for unsuitable pictures, or at least report them here if you find some.

Atom, what browser do you use on your phone? On mine it works fine (Nokia with IEmobile 10)
Is it an Android or a iPhone ?

edit: Android I guess. It seems that the ads redirect to suspicious sites when browsing with an Android user-agent...
So Google blocks the ads, and now I have again problems with Google-based things. They find all the time a new way to annoy me.
re-edit: the problem does not seem to happen all the time, but is quite annoying For now I'll disable ads on Android devices