This guy just comes off as very smug about a language he apparently has no idea what he's doing in. Bascially all the WAT?s are because Perl's lists are very d

This guy just comes off as very smug about a language he apparently has no idea what he's doing in. Bascially all the WAT?s are because Perl's lists are very different from Python's. If he had spent five minutes reading the very first chapters of Programming Perl he would make much less fool of himself. He explicitly asks to flatten the lists, so there shouldn't be much surprise that Perl obliges. That said, the security issues he pointed out are real ones. Be very careful in you are programming CGI (in any language)!