From time to time my blog will show a sudden unexpected spike in traffic. When I look at Blogger's stats to see where the traffic came from I often see that the referring URLs are sites that I've never heard of. I've tried visiting some of those sites and they almost invariably turn out to be porn sites. As the sites have no connection at all to my niche, I can't understand why they would have links to my blog and I find it quite disturbing to think that my blog might be associated with sites that I would never even visit. I'm also not sure whether this is legitimate traffic or bot traffic.
Could this traffic be harmful to my blog, specifically in connection with the rules governing my use of affiliate advertising and AdSense?
Is there anything I can do to stop this happening, or am I worrying about nothing?