Thanks for the link Raj but it seems the facts are quite basesless. Becoz had it been that neccesary then primarily the tail would have been a vestigial organ, but unlike dogs with tail had a hell lot of use of it.. Secondly, If it is so then why other normal breeds like Labs, GSDs and other simmilar breeds had never been docked. Thirdly, If you take a careful look, Rottweilers, which were a docked breed previously have mostly drooped this practice.
Also Most of the countries banned it tagging as Unneccesary and painful. So just does'nt seems that the website is holding much strength.
Link: https://en.wikipedia.org/wiki/ Docking_
(dog)#Legal_status_of_ dog_tail_docking_and_ear_cropp ing_by_country