Today's lesson: don't be a good samaritan

Radley Balko has a disturbing story of deliberate entrapment:

The Chicago Sun-Times tells the story of Erasmo Palacios, who, after dropping off his six-year-old daughter at school, was with his wife Rocio and their 22-year-old daughter, all on their way to breakfast when they saw a woman waving her arms. Thinking she was in distress, they approached her in the car, at which point...

...the woman approached their car, parked outside Manolo's restaurant, leaned in to the passenger side where Rocio was sitting and asked Erasmo if he wanted oral sex for $20 or sex for $25. The couple laughed, realizing this wasn't a woman in distress after all. But within seconds, Chicago police swarmed the family car, hauling Erasmo Palacios out in handcuffs. He was charged with solicitation of a prostitute.

Okay, so you might make a far-fetched case that Palacios really was trying to solicit the woman, but even if that was true, does it justify this kind of heavy-handed enforcement? As Radley puts it, "how many men have been wrongfully arrested for solicitation who didn't have their wives and daughters nearby to vouch for them"?