It sounds like a neat idea, however there are already force powers that use telekenisis style attacks. Throw Lightsaber for example. The downside to the skill your talking about is that it would not be very effective in many of the battles as well as only being effective to the point of tossing all of the objects in the area at your enemy. So unless it was extremely damaging and there were objects littered EVERYWHERE, it (in my opinion) wouldn't be worth getting. Unless they added the possibilty of having your lightsaber knocked out of your hand and the only way to get it back without running to it was Force Telekenesis (Force Grab maybe? or would too many bad jokes spawn from that...). There is also Force Push which is another similar skill.
Other uses maybe.
Evil: Stealing from shops? Rigging the races? Tripping innocent bystanders? Putting kittens in trees? :D
Good: saving someone from falling off of a cliff? Tripping dark forces? Rescuing kittens from trees?
Anyways! it's an interesting idea, but it would need to be expanded upon due to the extent of what would have to be done to have the objects there that could be thrown
then there's the short blunt list of deciding how things have to act:
object placement, removal from old placement, movement, deciding if object hits/misses, decide if it survives hit/miss, decide where it lands/or fragments land, decide whether non-destroyed objects (i.e. crates) should still be useable if not used yet. shouldyou be able to thrown an unemptied object?, ect, ect...
Even though it's not in my place to give you an actual answer, that's my opinion on it