The Arrow- Empty
Pearl- Full of TVs. No food etc. (also wondered about that)
Sawn- Blown to pieces (by
Locke and Desmond)
The Staff- Empty (as far as they know)
The Flame- Blown up (By
Locke)
The Decoy Village Hatch- Only Sayid knows about that
The Hydra- This one could happen. Although it is on another Island and
Locke blew up the only way out there
The Looking Glass-
Might not be big enough for all of them to get in.....
So no. The hatches aren't a good idea.
What if Locke wants his team to be caught. I mean he is making it very hard for them to hide/leave.......