Pretty ridiculous. Aren't we having problems finding candidates? Why care if they use the most leet irc client or write irc bots? Recruiting people you find on irc in coding related channels I'm all for that. But it doesn't scale obviously.
Yes, today "we can't find candidates" means usually "we can't find someone that fits our biased hiring filter determined by the personal preferences of the senior developer" And yes, make senior people write FizzBuzz on a whiteboard, they find it thrilling.
I've told potential employees "no" more than once due to sequences of hurdles during the hiring process that were easy to pass, but told me very clearly I didn't want to work there.
The more bullshit, the more likely it also is I'll receive and say yes to another offer while they're busy playing.