If someone can help with this

[Izv143]

I had some kids were flooding with one dot
like
nickname .
othernickname .
andother .

etc

Nicknames were totally mixed and there was no way to add spam filter on nicknames I was just bit confused if I add /spamfilter add c gline 1d spam .
that would make cleanup on the server
Any idea ?

[seraphim]

^\.$ should reduce the false positives by 99.999%, (because "." in a regex matches any character)

But the thing is if any user writes a "." he may forgott at the previous line he´ll get banned, too.