Well … you and OP likely live in a free country so if one feels confident about T&C’s being unreasonable, unenforceable or even unlawful, it can be taken to court.
In the interim, and without challenge, the T&C’s stand, should be respected and thus the conclusion stays the same: Get informed about T&C’s _before_ you hand back your property to a third party, otherwise don’t blame misinformed employees: people make mistakes, it’s a fact of life.
The best remedy against mistakes of otheres is to try and be informed, make only conscious, facts based decisions.
Choice is yours.