You are correct....it likely isn't acceptable.
Basically, I sell magazines and accessories for AR and other military-style rifles. The accessories one could almost call airsoft stuff, but the mag definitely isn't.
Some creep ordered one so they'd have a record, then locked the account.
This isn't the first time it's happened (not to me), but has been quite common with businesses like me. Freezing the money gives them a nice 6 month loan with which to earn interest....