1) I am not comparing MBBS with DO. That is not what I said. Obviously they are both medical degrees but that's about it. The only similarity is that both are confused by people who don't know much about medicine.
2) The only separate privileges I am referring to is that I have heard there are residencies for DOs only, practices for DOs only. It has nothing to do with excluding DOs. What I meant was that if, by some random turn of events, all medical degrees in the US were to be awarded equal distinction and a common term (say we just call them all "D" for example), DO training institutions may object more strenuously than MD training institutions, because there is perhaps more pride in the letters and the distinction between what an MD is and what a DO is among many DO trainees. From what I have gathered, there are tons of MD graduates who have no idea what a DO is. That's all. There is no impuning or insulting going on.
3) Those who impune all DOs are dolts.
4) Try this one on for size - I have a BA in chemistry. No one ever wants to buy my explanation that my college only gave out BAs. I don't know why I mention this, it's just that acronyms are interesting.
5) Too many frozen sections is definitely annoying. A resident told me about a case she had at the VA where they were doing some removal of a skin cancer near the eye, and the surgeon sent down ten frozen section margins (all from different places) all at once. And all 10 were positive. Total number of frozen sections at the end of the night: 65 or something like that. And that's far from the record.