Irreal is undergoing a sustained spam attack again. This is despite the nucaptcha, which is still working. Either the spammers have defeated it or they're paying a bunch of people a penny a piece to fill them in. In either case they spam only older posts to reduce the chance that anyone other than Google will notice.
To combat this nonsense, I've shut off comments for posts more than a week old. I hated to do this because I sometimes get useful comments on older posts but as usual the spammers are ruining things for the rest of us. Perhaps I can reenable comments on the older posts when the spammers give up and go home.
Sorry for the inconvenience.