I agree, it really does depend on your workplace, policies, and your position.
At my workplace I think I'd be more likely to get submitted to "Corrective Action" for using GD&T since few people around here would fully understand it (not that I have a complete grasp of it either).
The OP asked about people that "do not use GD&T properly." If by not properly it was meant that the dimensions are actually wrong or require additional expense (i.e. putting tight tolerances where they aren't required), then I don't think that GD&T is the factor. It would be no different than somebody putting 1 inch instead of 1 foot or applying a rectangular coordinate with an unnecessarily tight tolerance.
If that's the case, then I know what my employer would do if I continually made mistakes that significantly increased cost, difficulty, or impeded function... Provide me a correctly dimensioned drawing showing where the door was.
- MechEng2005