Yes. I have a standard declination letter.

> It was a pleasure speaking with, but I am unable to take on your matter at this time.

> The advice I gave was of a general nature. The law is complex, and nothing said in the consultation should be taken as compete or even correct advice respecting the intricacies of your matter.

> It is in your best interest to get counsel, if you can't find an attorney, here's the phone number of the local bar association. They may be able to match you with someone.

That's all paraphrased, but it about sums it up. And yes, I can spot a problem client 100 yards away, and will decline and even if their case may otherwise be solid.