Throwing out your own opinions about what is legal or moral isn't what the damn place is for. Its a community, there is yet another enthusiast looking for help deciding which netbook to put Leopard on. The chart posted early on is excellent. The untested Sony mentioned later is in my opinion exactly what a netbook should be.
If they buy OS X, what they do is their own business, as long as they don't pirate it en masse. Jaywalking is against the law, and it is no more likely that Apple will care if you put OS X on a netbook than if you jaywalk in NYC to the NYPD.
As far as moral, no such thing in American Jurisprudence. The moral consideration factor was tossed out the window in 19th century British Common Law.