I can't tell you how many times I have deleted these bogus ID's before they actually post offensive messages. In tracking the IP addresses, they are nearly all coming from Russia, and from the same SPAM outfit. Apparently they have figured out how to write a bot that registers for an ID, then comes back around and uses that ID to create a message.
One way to combat it would be for me to approve a request for an ID. I've been resisting that not so much because I am afraid of becoming a bottleneck (I only wish that was a problem) as I don't want to make the process of joining the fray more difficult than some would like.
The other alternative would be to set up some type of arrangement where you need to type in the graphically-represented letters in a box as many sites do. I have actually already registered for the key mechanisms for that. I am afraid implementing it may be a bit over my technical head, though. I may ask my son to do it for me.
In any case, these jerks really tick me off.