The idea is that the normal behaviour for a wiki is
that it is very unlikely
for an url to be referenced in an edit more than X times in 24 hours (I'll
postulate twice, just for fun), but it is very common behaviour for a
spammer.
Image edit war about link. Or text of article was deleted by vandal,
and someone want to revert change, but in text were links.
--
Alexander Sigachov