Very good post.
I personnaly lived the Poloniex delist (purge!) in April. And yes, people were angry! Some accused Poloniex of trying to make money by delisting.
Same with Bittrex, I saw someone claiming Bittrex would not delist BTS in the end (apparently this point was right). According to this person, Bittrex announced BTS delist just to buy a huge amount of them at cheap price...
What do you think about this possibility ?