That sort of connection would be very susceptible to psychic attacks - I'm thinking of the telepaths in Babylon 5, being trained for offensive capabilities, as

That sort of connection would be very susceptible to psychic attacks - I'm thinking of the telepaths in Babylon 5, being trained for offensive capabilities, as well as just plain old spam advertising. So while "defaulting to trust" is often considered societally useful, I believe that it would be better for everyone if cross-brain messages are sent in a format that can be analyzed (and entirely blocked) by a filter on the receiving side.