system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is "Bait Car" legal?
gpt
When a bait car or bait house is used, no one is forcing the person to break in to the car or house. Entrapment is only in cases where you are coerced by law enforcement to do something against your will or given the incling by law enforcement to break the law when it is outside of your normal activities. The same applies to dui traffic traps where the traffic is funneled into a stop. 

The other part of it is that the police department has to inform the public that these things are happening. When it is public knowledge either published in the news paper through a news broadcast or a sign in the parking lot the concept of entrapment is completely removed from the equation because it is now being publicly displayed that there are bait cars in the area.