Geeze, to me this is just ludicrous.
Think of all of the people who go on line to get lyrics, notation, tabs etc. and then quickly learn a song instead of just listening to it again and again until you've got it memorized. Not everyone can do that easily, and think about the playtime these songs get in social groups when you've learn a song. You play it for other people and friends when you jam, or even if you're out somewhere and people hear it.
It's almost like free advertising, and you're not stealing a damn thing. Could the next step be stopping bands from playing covers?
If they try that, they'll have to take on semi-inibriated bar clientel on Friday nights, and they're asking for it! We feel no pain!

If they do do this, it's not going to make people any less resourceful in learning songs and playing them. As was mentioned before, what a waste of time.