As an attorney trying to use a billboard to attract new clients, it's probably best to show the client why they should hire you, not how incompetent, insane or downright creepy you are. These guys and gals aim to show the entire city why their services should be avoided at all cost.
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To playtrombone64: No, I wouldn't trust a one-eyed attorney. Or a two-eyed one. But, somehow, I think that's answering a different question than the one you were asking LOL