Please exempt solvers from the spam filter
Spam filter should only apply to users that have earned less than, say, 200 points.
From the point of view of solvers, spam filtering means that some of their comments will randomly disappear.
Right now, I am going to have to reload every thread in which I post an answer in order to check that it has actually gone through. The site is already severely overloaded in the evenings, and it doesn't need any extra load on it. Other solvers, when they notice that the answers they've spent time and effort finding have silently disappeared will give up in disgust and quit the site.