I am getting deluged with comment spam every day, sometimes 500 to 1,000 spam comments per day. The filter catches about 2/3 and puts them in moderation where I delete them. The spammers are smart enough to keep changing addresses so the filter does not keep up. I spend about an hour each day deleting messages and have come to the place where I will have to require registration to comment. If that doesn’t work, I will have to redesign the site. The Word Press support is very poor and they do not answer questions. There is no technical assistance telephone number. My hosting company, Blue Host, does do a good job with customer support so I will turn to them if I have to do more than turn on registration. We’ll see how this works and I’m sorry for the inconvenience. Not that many people comment anyway so one registration should do it.