You don't just use the trust feedback without conducting proper investigation and having enough proofs to back the reason why you left them with negative trust.
So in Op case a negative trust is not proper as it was Op who failed to read through their ToS so if he should tag them he(Op) might be accused of abusing the use of trust,  I hope you get what I'm saying.

Like I said in my previous reply all I see this thread doing is creating awareness to those that were ignorant of something like this about the casino. 1x or at most 2x wagering requirement should be more than enough to achieve what the casino wants unless they just don't want people to be able to withdraw easily from their casino, that's the only reason I can think of why they would set such requirement.