Stupid/incorrect position callouts on prints

[[Da...]]

I've been doing manufacturing QC work for about 20 years now, and I've seen a good number of lousy prints; often companies use an intern to create prints, even if they don't have a good grasp on ASME Y14.5. Just this week, I found 2 pretty good ones (well, one that's worse than the other, at least).

The first was a general callout for all the PEM studs on the final assembly to be toleranced at "1.3mm MMC". Not sure if you can eve DO MMC on a threaded PEM stud? I suppose I could break out a pitch micrometer and the Machinery Handbook to find the major Ø and the pitch Ø, then determine bonus tolerance that way, but somehow I believe that's not correct.

The second was REALLY bad, though. A plane/hole/hole alignment, with datums B and C both being toleranced to A|B|C. Ummmm, no, you can't tolerance a hole to itself. I also think that, in the case of datum B, it would need to be defined before datum C, so that would make the callout on datum B wrong on 2 separate levels.....