People being hacked since the last Server Check.

If you have Nx already charged to your account, then lock it. They'll use that Nx to psok it. Is it fully scrolled and cubed? If so, lock it. You'll be glad you did if you get hacked.

i never have more than 2k NX on my maple account, as i said, i'm very... paranoid

One of the peculiar things the hackers do is spend all nx on arrows in the MTS, despite being able to profit more by psoking and soking equips.
I've only locked my tradeable items thus far in hopes that they don't deviate from this pattern should they hack me.

depends, in most cases dual-psoking a Czak would cost them 8k nx, which they can simply transfer to their account via arrows as you said. so the items would have to have some serious value for them to go through all that trouble.