I think it's fun and fine if you're promoted into these job descriptions - although I suspect they're often a substitute for a real career advancement or pay raise. What I think is ridiculous is when companies actually advertise for these things.

I also think HR should spend more time actually discussing real needs with IT before it writes want ads. Some of them ask for so many qualifications that you'd just never find in a real person - and if you did, that person certainly wouldn't be interested in your $35,000 a year job in Podunk, USA. I suspect the HR department just lists every IT acronym in its database for every job, without regard to whether or not your net admin actually needs to be able to program in .Net.