It's a delusion to think I'll stun anyone, but I'll give it a shot. Imagine a free society where person A wants to do something but fears it might hurt person B. Is it moral for him to do it without consulting B?

Extrapolating on that, the exchange of information between individuals allow them to take actions that would be immoral to individuals alone, either because they are unsure of the outcomes or not completely confident on the principles behind the action.