Actually, Superman can pull off such things as time meddling, like he did in Superman the Motion Picture, however we all know that everytime youd do something like that you risk opening a dorr or window to something much, much worse.
Realistically though with superman, he can be omniscient over a few hundred miles. He also has pretty good hunches on where trouble is going to be and as Clark Kent gets access to some of the latest breaking stories from around the world. You've seen the shots in Superman Returns the Daily Planet has hundreds of TV on every station imaginable around the planet. A being like superman who can multitask thousands of things at once can do his job and prioritize what things he deals with. After all if local authorities have it in hand no need for Superman to arrive and steal the thunder. But if there is nothing on Earth that could solve the problem he makes a beeline.
In the end every person would have to make a choice of just when do I interfere. Do I try to stop everything, or just help out where the police, EMT and even the military are spread too thin or completely uncapable of the job? Not to mention stopping the occasional petty crime when I am in the immediate area.
Realistically though with superman, he can be omniscient over a few hundred miles. He also has pretty good hunches on where trouble is going to be and as Clark Kent gets access to some of the latest breaking stories from around the world. You've seen the shots in Superman Returns the Daily Planet has hundreds of TV on every station imaginable around the planet. A being like superman who can multitask thousands of things at once can do his job and prioritize what things he deals with. After all if local authorities have it in hand no need for Superman to arrive and steal the thunder. But if there is nothing on Earth that could solve the problem he makes a beeline.
In the end every person would have to make a choice of just when do I interfere. Do I try to stop everything, or just help out where the police, EMT and even the military are spread too thin or completely uncapable of the job? Not to mention stopping the occasional petty crime when I am in the immediate area.