User blog comment:Juracuille/Strawhats imprisoned at Impeldown/@comment-3242083-20101210155404

Level 6 Luffy (beating up g-8 marine base, thousands of marines, beating up impel down, rang the ox bell, confirmed son of dragon)

Robin (last Ohara, Arabasta incidents, hitting spandam)

Level 5,5 (Okama level)

Sanjy :D

Level 5

Zoro (he is powerful enough to be in six, but he isn't "dangerous" enough

Franky ("low" bounty, but destroyed the blueprints for the super weapon, nearly killed spandam)

Level 3

Brook (Bounty)

Level 2

Nami (Bounty)

Level 1

None

Chopper would't be imprisoned, he is a 50 bely pet. If they knew about his monster form (that destroyed enies lobby) he would be in level 6