I talk to a lot of lads that are into personal protection/security work and the very mention of a sight hound cross has them in stitches, these guys work with herders/American bulldogs/Presa/Pits/Bandogs etc.
There's dogs that display aggression when confronted then there dogs that mean it and can take any pressure a man can dish out and are fully commited to hurting/killing the attacker, not turning and running away. Seen some supposed double hard dogs of varying breeds been run of a training field when put through their paces.