These visits are what are known as fake referral traffic. When a person goes from page A to page B, page B receives information that it was visited via page A. Page A gets logged in your Blogger Stats as a referral. Now, everyone knows that people check their stats and visit the referral sites to know more about the page/link that is giving them hits.
Now, spammers come into the picture. There are methods ( browser extensions and many other things ) by which you can change the referral site. For example, you can visit page B by simply typing the URL or by clicking a link from page C but still tell page B that it was visited via page A though it is not true. Now, you see page A as a referral in your stats, you visit that site and site B gets page hits. The spammer wins.
Now, for the spammer does not want to simply type all the URL or even click them. So, he writes scripts/programs which will load random pages once the script starts executing. All that the spammer does it click a 'Run Script' button but he gains a lot of page views from different bloggers.
Next, that spammer wants to know which blogger is clicking the link in their stats and visiting his page. So, he adds some parameters to the end of the referral URL like www.someSpamSite.com?s=XXXX. The XXXX will be different for each of the target blogger. So, if the spammer sees an XXXX in his stats, he that that the blogger who owns page B has visited that site. That spammer tells to his friends about page B and they do start sending fake referral traffic to that site. So, don't click on such suspicious links. Your blogger stats will become even more spammy.
Now, what can you do -
- Don't click on such links
- Stop using Blogger Stats
- Use Google Analytics. I think GA does not record these fake referrals - I see such fake referrals in my Blogger stats but not GA stats.
Note : There might be some technical errors in what I have described but more or less, what I have said is correct. 
