I'd never "go clean" for a job simply because I don't see the point in lying to them. If I'm going to abstain every now and then to test clean then what is the point exactly? As soon as they turn their backs I'll be smoking again and so will you. You want to talk about "priorities" well... it's a priority for me to work somewhere I can trust and be trusted. I'm also not going to put money in the pockets of people that actively support an industry so vested in marijuana prohibition (i.e drug testing agencies).

There are plenty of reasons for not submitting to drug testing. "I'm lazy and I like to get high" isn't even on my list. Blindly pissing in a cup instead of asking "why?" is what stifles legalization, not those who challenge it.