Why would leaving an unsecured bike to catch thieves be illegal? Entrapment is when law enforcement gets people to commit crimes they wouldn't have considered committing otherwise.

Plus your lawyer needs to make a convincing case that you only took the bike because the cops left it unsecured to trick you, and not because just you're a thief who stole some shit and got caught. Tough row to hoe.

No, and the general rule is that it’s never entrapment. I don’t know how people get the idea that either of those scenarios would be entrapment.

It’s still not your bike, why would you be permitted to steal it just because a cop left it somewhere?

(I say this as someone who seriously disagrees with the outrageous powers that wildlife cops and regular cops have)