...Having said that, most people know that Bitshares is going to have elements of the Roman senate, maybe people will even stab or murder each other eventually.  It will be great for Coindesk news.  It's also going to have elements of corporate fascism, as corporate entites attempt to gain control of a disproportionate number of nodes.  If the ownership of publicly operated delegates seems fishy to you, you can simply stop using the system.  If they're operating nodes on the system, they probably have assets on the system, and will most likely be hurting themselves doing this.  

This is like if you see two Bitcoin PoW pools in China that combine to make up 70% of the hash rate but are owned by the same guy or brothers, you might stop using BTC.  The Satoshi system is obviously not sybil resistant in this case.  The incentives to not do this are basically the same in both systems, but it can still happen.   There will always be politics you can't escape from in the real world that you have to audit yourself.

The purpose of DPoS is kind of to engineer the way these systems play out from start to finish in a defined manner where the likelihood of things like sybil are minimized, or force them to be visible for you to audit yourself.  If you're uncomfortable with the delegate ownership or coin ownership, you should simply not use the platform...