Too old for your tastes?

Whilst travelling into work every day on the bus its normal to hear the strains of music seeping from various MP3 players. Normally the worst offenders seem to be those listening to dance music (probably because of the tone and pitch of the music (and possibly because I don't really complain when someone's listening to something I like!)) I noticed the other day however that one of the annoying bleepy tracks was coming from a guy who was a bit older which just seemed plain wrong. I don't know what I thought happened to dance music fans when they got older but the idea of a 40+ year old listening to it just seems a bit odd. This notion is music genre biased however as I regularly see ageing rock music fans and think nothing of it.

So...
The big question is... Is this

More acceptable than this?