-7 feels good. I bathe in it.

It's Facebook - it's not a referrer, it's a static image link.

Note: "fbcdn" = "Facebook Content Delivery Network"

The picture is a meme, and a rather ugly one at that.

Now, if there is any single thing to worry about here then it's "de-anonymising". Click a Facebook link, you're logged in - boom! There is potential that by being logged on to Facebook your IP Address can be cross-referenced and you're de-anonymised. I could care less because "they" know who I am and what I'm about, but if anybody is using Tor then they'd do well to not be logged into massive data miners like Facebook or Google unless necessary. And hence the downvotes.