True; as digi_owl indicates, you could only ask for the next element in the path, too.
Also, you are implicitly trusting each level in the tree to be honest, anyway: even if you say, 'hey com, give me example,' he could always give you the address of a computer he controls instead of the real com.example, and thus get the next item in the path from you when you ask him to resolve it.
You can't get away from trust: whether it's trust in DNS, or trust in CAs, or evne trust in the great masses reporting public keys seen in the wild, you can't get away from trust.
Also, you are implicitly trusting each level in the tree to be honest, anyway: even if you say, 'hey com, give me example,' he could always give you the address of a computer he controls instead of the real com.example, and thus get the next item in the path from you when you ask him to resolve it.
You can't get away from trust: whether it's trust in DNS, or trust in CAs, or evne trust in the great masses reporting public keys seen in the wild, you can't get away from trust.