The quote from ripplescam.org just says what we all know, we all have to agree on a blockchain (in the case of Bitcoin) or a ledger (in the case of Ripple) or the system breaks. Part of it is false though, you can connect to servers not run by us. So long as they're also trying to agree with us (or those who are trying to agree with us), it will work. Ripple uses a distributed agreement protocol to order transactions. You have to try to agree with other people who are trying to agree. The group of people trying to agree that includes us defines the dominant transaction ordering (at the moment). But this is equally true of anyone else in the group we are in. It's the group that matters.

I don't see why minimizing the number of validators is attractive. We want as many as possible precisely because that ensures that administrative control can't be seized. It's just like mining in Bitcoin -- you want it distributed into the hands of as many people as possible as evenly as possible. We are working on making this happen now. Obviously, open sourcing the server was a necessary stop to broadening the validators.