What's even more fun is when a qualified indigent gets one of the top criminal defense attorenys in the area as appointed counsel and then gets the family to pool their resources to hire some out of town hack with a big ad in the yellow pages.
I've had a fair share of experience with this, and I'm always left a little torn. I've had cases where I've already talked the D.A. into giving my client a conditional dismissal or where I know the case will be dismissed on speedy trial grounds on the next date, when my client calls me and tells me "I've hired a lawyer," or, worse, "I've hired a 'real' lawyer."
On one hand, I want to say, "Wait! I'm a real lawyer! I was going to beat your case for you!" On the other hand, my caseload is high enough as it is, and private attorneys need work too. So, it's better not to say anything.
But that doesn't mean I can't sit back and laugh though when the hack (oh, I mean "real lawyer") messes up their case.