It's not RF snobbery, the point is that this approach to transmitting RF signal is shitting all over the spectrum with harmonics and potentially interfering with other legitimate activity.
Sure, you can get shielding and bandpass filters, but by then you're back at $100 bucks and have terrible radio to boot. The Pluto and Lime Mini are very capable transceivers for ~$150.
The RPi isn't going to bring down airliners and start WWIII, but radio spectrum isn't going to work if people don't cooperate and be good neighbors.
