Spot on. When the company tries to press to test on a provision of the CBA (it doesn't happen often but when it does it usually involves not following the R1 call out rules or the required crew rest rules) I call them on it. No rant, no loud voice, no disrespect but I do have the CBA open to the chapter and verse involved. I've never yet had to go above the first level of contact by approaching things this way. Scheduling or Travel will occasionally float something out there that exceeds the protections we have in the hopes the aviator involved hasn't read the contract. Obviously it works often enough that the practice hasn't gone away. The only defense is to know the contract and stick to it.