Actually it is a fine idea. If you get to the right ones they are actually licensed by the state in which they operate (you can go to the state website and look them up). You get the protection of having a real doctor write you a script. It completely protects you. The only person who's ass is on the line is the doc's. The stuff is more expensive but it's the price you pay for that assurance.
So...why is it a bad idea WW?? Because you've never done it?