You're going to call OMGUS but this absolutely stinks, especially given the timing. Filthy stuff, completely regardless of Frinckles's alignment. Either you were distancing Frinckles and hopped off once that became an actual wagon, or you wanted to push someone and then act like it wasn't your fault when they flipped town. "I'm not against the Frinckles wagon or anything but" is just a fig leaf for scummy play.
This is also effectively a vote for a NL given the way Day is going so there's that too.