Kalmbach Publishing has some terms of use which are now being enforced. Since they pay me, I am going to follow their terms of use obviously. The relevant part for comments here:
Blog Comments Terms Violating any of the Terms below may result in your account being locked. In the event that your account is locked, we may, but are not obligated to, remove comments you have added to our blog. Please keep comments on topic (that is, specifically related to the blog post you're commenting on). Please keep comments cordial. No swearing or foul language, and don't use symbols to mask the words. The meaning is still conveyed and we don't want it in our blog. Please keep in mind that we have readers of all ages.
The swearing part is pretty straightforward. I have no idea what 'cordial' entails. Some readers say rather ignorant or stupid things now ...