You know what? I am not worried about this darodar.com referral spam / referrer spam. The worst that can happen is you see some funny links in your Google Analytics. Just dont browse to those sites. But the part that’s more disturbing is that anyone with some programming skill can actually create a tool to randomize Google Analytics code and send Fake visiting info back to Google. Followings are the implications:
1/ Google demotes you.
2/ Millions of GA users visit your website and create a DDoS situation
3/ Google BAN’s your GA account.