both chinese and english people has decreased obviously (since p2p)
but since NCsoft didn't ban chinese IP, there are still chinese players on the server.
and when you say 'hackers' do u mean using third party programs or using exploits? because if u are reffering to exploiters, there are still some (like the people in tault for example

)
i think NCsoft's decision of not banning chinese IP was wise. well they make more money that way, but also because the chiense players shouldn't be discrimated agianst.
everyone just assumes they r all 'botter's or 'hackers' without proof, a lot of em just dun want to speak (maybe because their english is bad).
anyway, to finish off ur question, their should be less people because of P2P
