One thing that can be said about allowing bad things to happen is that almost all bad things that can happen are caused by carelessness, decay, or other factors of nature that would happen whether we had free will or not.
If a bridge collapses sending cars toppling into the river and drowning their occupants, it's because that bridge was built by fallible imperfect humans and either they made an error in the bridge design or nature ran its course allowing for rust or bad weather conditions.
If a fatigued employee falls into a chum grinder and dies, it is due to his carelessness and lack of sleep that caused his demise. Once again, silly fallible humans.
If a child in Tanzania dies of malaria, it is because an insect (mosquito) already carried the transmissible disease and infected the kid just by going along with its normal instinctual lifestyle. Fallible humans? Not so much. Normal nature process? Yes. Disease, destruction, fatigue, and pain all began with the choice of free will. Either God can have his own robot army that coexist and never advance themselves, or else he will give us the chance to find our own enjoyment and make our own discoveries to better our lives instead of having it handed to us.
Poll