It depends on whether you normally play like this or if you want to advertise in order to get action later on.

If you play like this a lot, then fold it and don't let them know you are a bad player because they will eat you up.

Otherwise, if this is a rare thing (and as long as it is cheap), you might as well see the river as a form of advertising. The good players will notice you were playing with crap, and will lower their standards when playing against you in future hands.