I actually just learned how to play the game and all... And I probably have no right in saying this but...
Field, hand, etc locking is...pretty much already too much of a step into being like Yu-Gi-Oh. I was happy in my simple little world before one of my friends had to go and bring Scramble Energies, Dark Tyranitar, and Rare Candies into the mix.
In the end, competitions just get sort of annoying. The Metagame nazis, or the degenerates of the gaming community as I call them, bring the game down to simple "this wins and that is all the game is."
However... Personally I don't believe in banning all too much. I say things should be handled within context. If people want to rip off a deck, that's fine... that's their choice, and they should be able to choose their own paths and subsequent consequences. But they should be pitted against the BIGGEST MEATIEST METAEST DECK, FORGED DIRECTLY BY THE GODS AND SHOVED DOWN ONTO THIS PITIFUL PLANET JUST FOR THE SOLE PURPOSE OF PURGING IT OF THOSE SEEN UNWORTHY.
Ahem.