No, aiui, the trust model is the same. If a peer announces routes to you, all you can do is:

- throw away "martians" (routes to known-reserved/bad parts of IP space)

- throw away stuff you know they shouldn't be announcing (your stuff basically)

other than that, I think you have to trust them when they say that they have a magic route to IP 16.0.0.1 which is shorter than any other you know about. (Since it might be true).

My understanding is that it would not do anything to help prevent deliberate attacks on BGP. But I do think it may help limit the damage of accidental BGP misconfigurations since the routing tables are less confusing and crowded.

No.