In Mexico I have seen fallen branches as well and a very large fallen tree in a cement factory that had lots of Brassavolas that were burning in the sun. I went back 3 months later and that tree was still there with the orchids dying.
I met an Aztec guy that owns a plot of jungle and he has been taking fallen orchids and put them on trees by his orchard. Mostly Oncidiums and rat tail Oncidiums.
I met a woman that had a beautiful R. digbyana in her yard. I was some how disappointed to see that it was on a sawed off branch - it must have been taked as a whole specimen from the wild.
An old lady put a Myrmecophila on a tree in the street outside her home and it was doing great. it was a huge specimen, all green with happy roots on the trunk. It was doing better than those I have seen in the wild, where only the new pseudobulbs seem to do well and the old ones dry up.
I believe there in Quintana Roo Myrmecophilas and Brassavolas are very common and not endangered and I have seen them everywhere.
As many things in life you can not say something is good or bad, but it depends how you do it. I saw swaths of thick jungle being bulldozed to build a residential area for tourists.