The "source code" of http://samy.pl is quite interesting
/*
No source for you!
*//
/.source.replace(/.{7}/g,function(w){document.write(String.fromCharCode(parseInt(w.replace(/ /g,'0').replace(/ /g,'1'),2)))});
There is a huge amount of whitespace is the page source. A mix of tabs and spaces. The page is encoded in that. Have a look in the inspector to see the decoded result. It's a bit like this: https://en.wikipedia.org/wiki/Whitespace_%28programming_lang...
Ah, looks like they have a regex that is just whitespace, get the source of it, and do some replacements to turn it into code. 7 bit binary, with spaces = 0 and tabs = 1