This reminds me of a few years back when a popular web editor had a free trial period. After that, if you continued to use it without purchasing, it would add something like "*** BUILT WITH ILLEGAL COPY OF <BrandName> WEB EDITOR ***" to the meta title of the page.
Anyone could go in and easily edit out text with another editor. But not many people did- if you searched on that string in Google, tens of thousands of sites came up. :)