This is often done and usually for 1 reason. They want to be deleveled for certain reasons
A. PvP/GvG (I deleveled 45 levels to opt into a lower ladder a few months back, gained 20 levels back and found a juicy GvG target so deleveled 18 levels last week)
B. They want to earn more XP for their guild and are sitting at EoC
There is nothing wrong with this....The Prestige transfer on the BB is minimal and 1k stam for 10 prestige is very unlikely to be abused
.
May be not but it is not at all funny for the people that is constantly getting hit by these bullies