Shrturl.co is a site that lets you 'edit' any existing website and create a fake version of it with your own text.
Here's how it works. You go to shrturl.co and put in the website you want to change. That site pops up in your browser, and you can rewrite the existing text. Then, you send people the URL, which looks like a generic URL shortener, and they see the site as you edited it.
It's a fun tool for stupid, goofy gchat pranks, but it takes zero imagination to see how someone could use shrturl to start a hoax. So, you know. Caveat Emptor. Or Caveat Browser, I guess.