I think a rough analysis user / IP talk pages could give you a number
pretty quickly. You probably would want to do it by hand first and then
write a script that analyses the wikipedia dump file. It is doable by hand,
if you just sub-sample a few hundred pages randomly. And if normalized by a
total
So Piotr, if I understand you well it is about the question how many of the
people who are our "contributors" according to the statistics (per 5 edits
a month, or 100 edits a month) are actually vandals? I could imagine that
some vandals manage to make 5 edits before being blocked, or lose interest
