ive seen episodes of the dog whisperer will reform aggressive pits to the point they pass "the guinea pig" test.
(their squeaking and wiggling is especially hard to resist)
its purely a matter of teaching them to respect and submit to the things we want. do not leave them to thier own devices or people get hurt.
http://www.youtube.com/watch?v=h77O3CgwKNghttp://www.youtube.com/watch?v=S4RqB-HjkdI&NR=1http://www.youtube.com/watch?v=pUV1oTciznE&NR=1also while on the subject.. watch this fascinating series!!!
http://www.youtube.com/watch?v=xJQdYG2WHoE