I don’t know if there’s any legal implications, but morally it’s pretty abhorrent. The question I’d be asking is would you even want to work for a company that engages in that type of tactic, especially since they’re likely to repeat that kind of nonsense after you’ve started the job.
Turns out knives you can eat a surprising number of before it kills you
Account of a Man Who Lived Ten Years, after Having Swallowed a Number of Clasp-Knives