Surely it is not possible for a person or entity to simply waive their legal obligations, simply by just using a website. Poloniex seems to think that they are able to exempt themselves from US laws with just a few sentences.

Whether this is legal or not is beyond me. Thus far, the consensus seems to be no, it is not. In-fact, the very mention of this may if anything be damning to POLONIEX should a(nother) class action ever actually take place.

What are your thoughts?

WIll you continue to trust POLONIEX with your funds? I myself use many different exchanges, but have moved most of my crypto over to Bittrex from POLONIEX, but that could be short lived because I have been hearing good things about Cryptopia.