The ability of consensual exchange to increase utility for both parties frays at the limits of the ability of the parties giving consent to predict the results of their decision. Our ability to express the inherent failings of consensual contracts requires us to understand the limits of our own predictive power, which turns out to be a monstrously difficult scientific question.

However, it seems to me that, if one party to a negotiation takes actions which are intended to limit the other's understanding of the exchange, the usefulness of consent as a mechanism to prevent bad trades is degraded. This is not quite violence, but it is scummy, and it doesn't seem that it would be "anti-capitalist" to restrict it.