Absolutely. Too many people underestimate a polite but resolved refusal to sign (without modification) any contract (including recipts!) whose terms you do not

Absolutely. Too many people underestimate a polite but resolved refusal to sign (without modification) any contract (including recipts!) whose terms you do not agree to. Not all, but many orgs will oblige if you don't seek to abuse it. Obviously Ymmv, not a lawyer, free advice from random internet stranger, caveat emptor, etc, etc.