Sometimes spam ads come up in the comments. They are usually sneaky, they give you a generic compliment like: "Thanks for sharing this information, very informative!" This is followed by a link in blue: "Air Conditioning Filters"
The spam ads sometimes have some indirect relation to the blog post.
Today I found a comment after a post on the Estes Mini Mosquito.
"Work so well. Drives away all the mosquitoes in seconds. Mosquito Repellant India"
Delete, delete, delete . . .