Guest Kay's example is a little different in that there was dishonesty involved. The gig wasn't cancelled, as the singer told the band. Nor had the band split up, as the singer told the booker. Sounds like the singer was getting back at the other band members, since he apparently was forced to leave the group, and he was probably pissed off. Not saying the band might not have had a good reason for getting rid of him, but he probably didn't agree. It can be difficult putting and keeping a band together - getting the right skill sets along with the ability to get along together, put in the work required, etc.