I have taken to switching on the moderate comments function on this blog. I have found to my utter disgust that the comment spam rats have shown up and chewed holes in just about everything. Some old posts of mine have close to 200 spam comments. And a lot of them have some.
How in the world do you get rid of those except for one at a time? I could selectively turn off comments but that is a lot of work. Having to moderate the comments is a bit of an inconvenience to any commenters here, but there aren't all that many so the inconcenvenience to the few is outweighed by the ability to prevent any new incursions.
I only wish I could just fumigate the place. Ticks me off not a little bit.