No way, Tfong007! People are human & should not be expected to forfeit years of salary.

I agree partly with Sbrower that it is unethical to exploit an obvious error & try to hold the company bound. However, if it is an error, the company has a duty to cancel fairly quickly, not months later, & to reimburse the customer for any expenses caused, such as airline penalties.
A few years ago I booked a rate of C$0 a night at the Delta of Whistler, BC, in April for July. I even got a confo e-mail! In June I checked my res & found that they had changed my rate to $179 a night without notifying me! So I called CS to let them know & to cancel, for I ended up not needing to go.