As I feared, spammers have found the form for flagging annotations and
have begun submitting spam through it. These days spammers just send
spam through any form they can find, whether it does them any good or not.
So I’ve switched on a feature I built into it, just in case, which
requires you to answer a (currently very simple) question before you can
flag an annotation. Hopefully it will be enough to stump them. We’ll see…