Someone just added the following comment to one of my old posts on RSS.

the purl-based URI with referrer field is practical and easily implemented.

I would say that looking at comments made by only someone arriving from Google, this one falls in the top 1% percent of most on-topic posts.

And yet, the URL is for www.pen1snlargement.com (‘i’ replaced with one to hopefully not attract a new wave of spammers).