> A suicide pledge in a contract is unenforceable (both socially and legally), so signing it or not doesn't really matter.

If it doesn't matter, it shouldn't be in the contract. I don't tend to have a lot of drafting power in employment contracts, but pushing back on meaningless contract provisions is a lot easier than pushing back on substantive ones.

It's at least worth getting them on the record, in writing, as 'we absolutely insist on this (bullshit) contract provision being in here, it is required for your continued employment'.