Camille,
I was under the impression that the patent on orchids pertained to the asexual reproduction of the patented plant and the selling of those mericlones. It did not apply to any divisions or seed from the original plant. There are so few orchids patented when one looks at the hybrids out there, it may even be a moot question for our hobby. On the other hand, roses, hydrangeas and similar perennials are heavily patented.
In regard to the NOIDS in the mass market, the comment of "too lazy to make all those tags" is probably the 1st reason. The second is "who cares", and the 3rd is merely "keeping the breeding a secret" for whatever reason.
CL