The level is pretty constant, you don't notice most of the spam because we take care of that - when either me or isadora are online.
Unfortunately we cannot switch currently to a mode where user accounts need to be activated by moderators, or first posts of new users
need to be approved by moderators. There are pretty complex technical issues involved, mostly due to our forum setup.
Check e.g.
https://ml.mageia.org/wwsympa-wrapper.f ... 00000.html for the last time I've tried to help change this.