For informational purposes...

None of us ever knew what a DO was until the legendary CatmanDos took place. Just about all Flyertalk DOs were inspired by CatmanDos. You could say that Catman trailblazed this concept on Flyertalk.

Now before my fellow New Yorkers have a hissy fit I'd like to say calm down boys. It's all a matter of words anyway.

Since DOs have been around FT since the late 90's, no matter what your opinion of the term, it's been granted an easement in lawyer terms.
In medical terms it's like the doctor telling you to take a pill. Just swallow it.

As for the disagreement on the term DO, all I can say is tough knuggies.