Which is why, as Eor said, time control would be the best single ability in a realistic world (loloxymoron). However, if one is smart enough with the power, stuff like that should never be a problem. Think about it. Time control, unlike flying, pyrokinesis, superspeed/strength or invincibility, isn't a very conspicuous power. Say I wanted to steal some stuff. I could stop time while sitting quietly in my house, go steal my stuff (while it was closed, if the place was a shop), come home with the gear and re-start time. The people who work there would know that they've been robbed, certainly, but when they see that the surveillance footage doesn't show anything, they'd just think it was by some very clever thieves, not someone who can defy the laws of physics.
Compare this same situation with say, superstrength, you'd still be able to steal the stuff, but if any surveillance gear sees you, it's still going to show some guy lumbering up to the side of the building, punching through it, walking up to and taking all the stuff before cheesing it. Before too long the government would somehow catch you and start doing SPERIMENTS.
And that's why time travel would be the best superpower.
... I have put far too much thought into this.