Someone is trying to spam the heck out of one of my sites for weeks now using the same Opera user agent with a link embedded in the user agent. I assume the purpose is to get some SEO value as I automatically publish all the blocked user agents but they don't show as an actual link on any page, just the raw HTML like below.
Here's a sanitized sample as I wouldn't want to give them any actual promo:
202.43.183.61,"Opera/9.80 <a href="http://www.example.com">how much is my car worth</a> (Windows NT 5.1; U; en) Presto/2.10.229 Version/11.60"
202.162.219.122,"Opera/9.80 <a href="http://www.example.com">DIY HOJO motor</a> (Windows NT 5.1; U; en) Presto/2.10.229 Version/11.60"
213.218.178.125,"Opera/9.80 <a href="http://www.example.com">Free Promotion</a> (Windows NT 5.1; U; en) Presto/2.10.229 Version/11.60"
70.137.152.108,"Mozilla/4.0 <a href="http://www.example.com">ipad lessons</a> (Windows NT 5.1; U; en) Presto/2.10.229 Version/11.60"
Looks like perhaps I should exemplify their embedded links before I publish the page just in case my site is passing any PR, it won't for long ;)