Comment Spam - Technique #xyzI noticed that recent instances of comment spam on blogs have had the following template:
The first part of the comment usually has a paragraph & headline from an online newspaper. The second half actually has the spam content (usually saying "what a great blog - check mine out at link").
This is interesting, for it continues to show what a game all this is - spammers thinking of newer ways to beat filters. Obviously here, they don't have to add random non-spam words (like they did before) to their content - probably the spam-fighters caught up with that. Instead, the random words are more cohesive, and relevant to that day. I guess they cottoned on to a pattern, where on many blogs that tend to be regular newstrackers, people would post links/extracts from a recent news piece.
Perhaps the idea to use here is to check relevance between comment and post (a very hard thing to do realistically - needs to be coupled with a whitelist etc). Meanwhile the easiest thing you could do on your blog is to see what additional services your blogging service provider has made for combating spam on your blogs, and to enable them.
[An example of such spam can be seen at Hirak's latest post (don't delete it, Hirak :-) ) . The lovely, but no doubt fictional, Adele talks about recent changes in the furniture business - the news item here (item happened about 4-5 days ago). ]