It's time for no logs relays service that do not track or record your IP, and therefore are unable to disclose this information to third parties. And they should be located in jurisdictions like Switzerland as Proton Mail & VPN.
The option to opt-in to as a setting is nice as it would be controlled by the end user. Better than arbitrary blocks and shadow banning according to the will/mood of some dictator-in-the-making that own an app or relay that has a bigger share of the nostr "universe".
It would be cool if we could attach an expiry time on private messages so they could trigger an automatic deletion by the relays. Not sure if it would be technically possible though.