You shouldn't touch someone's possessions without their permission.
Sally is on the bus but the only empty seat has a purse in it.
Sally wants to sit.
Sally asks the other passengers who the purse belongs to and waits for the owner.
Sally grabs the purse to put it on the ground.
Sally gets to ride the bus in peace without suspicion.
The owner of the purse comes back and accuses Sally of trying to steal.