Should I be worried?

Because I don't have filters on my blog, I get a number of comments from Anonymous. Many of them never actually post to the blog, but the feeds come through to my e-mail. I usually just ignore them or delete them. In fact, I'm not sure why I even bothered to open this one. The comment started out as the usual amorphous post, however, I was struck by the link at the bottom. Here is the comment:

Anonymous has left a new comment on your post "The Ubiquitous Columbine": 

Howdy! Do you use Twitter? I'd like to follow you if that would be ok.
I'm undoubtedly enjoying your blog and look forward to 
new posts.

Here is my web-site :: click for source (www.serialkillers.net) 

I have not clicked on the link. I am curious, though, as to what the site is all about. However, I'm not going to go there, because I don't need a virus or a cookie or something like that on my computer. Now the thought of a serial killer following me on Twitter, doesn't bother me, because I'm not very active on that platform, in the first place. In a way, it's a little dead to start with :)

Still I wonder how these people or robots get away with registering their URLs. It's interesting that the post of mine that anonymous chose to comment on was one that was mainly about the flower, Columbine, however, it did mention the terrible shooting at the high school there a few years ago.

What do you think? Should I be worried?

The picture? The best I could do for a bird related theme. These guys can follow me anytime!!