Bitcoin ETFs are simply a response to the need of the traditional financial world to keep up with the evolving Bitcoin-economy. They do not represent the rape of the Bitcoin philosophy, just the use of a time-honored method to facilitate access to a new asset class. It is the responsibility of each individual to maintain control of their own Bitcoins and use or avoid the traditional financial system as they see fit.
Resistance to such developments is futile and only distracts from the essential task at hand, which is to educate people about the true nature and value of Bitcoin. Education is the key to staying true to the core principles of Bitcoin.