My forum and Norton Bots

I just reopened an old forum of mine (http://patriotwebsites.net/forums/) and in the last 4 days, I am CONSTANTLY getting hits from Norton bots.  The bots are 'from' alerts.norton.com What is up with that because I have NEVER gotten hit with them in the other forums I have set up or run or helped others with...

 

I guess I dont mind BUT I would like to know what is up with this new bot.. Is it a NEW bot by Norton ?? OR is this the starting of a blacklist of my site??