@Pipio:
How effective have the shichibukai been though? aside from Kuma, and hawkeyes?
Moria was on his own island for 10 years playing lets build a zombie with hogback.
Don flamingo mostly just sold slaves and did evil deeds whenever possible. Crocodile took over a kingdom to look for a blue print to destroy his enemies. Hancock was always doing her own thing that jimbei didnt even know what she looked like.
Jimbei was allied with white beard so anyone who came around with his mark or was allied with white beard most likely got a free pass.
I think pacifista were created to get rid of the shichibukai, They certainly have enough power to take on a 300mill berri rookie. Put one pacifista one each island on the grand line and see how many pirates will stop sailing. Maybe 5-6 on shabbondy island just in case a rookie makes it. In the new world might be a totally different story, but shichibukai didn't go to the new world anyways on their own.
At heart they are still pirates of course there going to bad things, WG probaly cover up what the Shichibukai mostly do, Crocodile was seen a hero in Alabasta even though no one knew what he was really doing and also With Moria ( i could be wrong) WG hadent check up on him in ages so they were sort of unaware of his army. WG seem to try and cover everything up, we have seen this several times.
Also it would seem right if they did use Pacifista unites against pirates in the first half of the GL, Supernovas struggled to take them down and they are considered to be strong. But the Shichibukai are stronger then the Pacifista, they dident stand a chance against Boa, but that being said Moria was beaten by them. So maybe they could use both by limiting to the Shichibukai down in size.