Another problem I see with creating artificial barriers is the demoralizing effect in can have on someone trying to learn a language. Whenever I'm prevented from doing something because some committee thought it was too complex for me, I begin questioning whether I'm using the right tool. Who knows what other random rules are going to jump out and bite me later.

I would much rather do something the wrong way and be burned by it (and probably learn a lot in the process), than be prohibited outright from using certain techniques.