After coming across a few sites that were serving pharma spam to Google Bot but not regular browsers, I thought it would be fun to give Sinatra a try and come up with a quick web app that checks for cloaked links. That lead to a few more checks, then some improvements, and Is it hacked? was launched. I’ve got some ideas for where I want to go with the project, but in the meantime it’s catching stuff that other sites in the space are missing.
There’s also a bookmarklet at the bottom of the page. You can drag it to your button bar and check the site you’re on for any infection.