Why don't Police riders hang off the seat?

[clayt74]

Cos of this thread I have now been trying hanging off, im still having to think about it too much to really give it full beans but have experienced the feeling of the bike being more planted in an upright position. But still not convinced that even with a lot more practice that I could actually achieve more speed or a better line? Gonna try it some more whilst the sun is out just cos as an engineer the peoof is in the testing