I'll add that there are some other CM's here who make up further rules i.e. they only want an LE pin for an LE pin, etc. Since it's like for like, I don't get upset about it.
And yes, I have been more often encountering CM's who say "I have my own personal pins if you'd like to trade". Which is totally not allowed. But it's my choice to trade or not, so, fine.
I'm still curious if more people are encountering these different sorts of trading at WDW or if it's mostly a DLR phenomenon.
I'll note that for the "blind trading" - which I hate - I don't think I've seen it at DL Park. It seems to happen just in DCA and in the WoD store in DTD. Trivia and Diamonds I've encountered in both DL & DCA and throughout DTD, and again, I like those as "magical experiences" and ways to keep people from trading scrappers for better pins!