The best way to remove hair from carpets

Your carpet is now light tan, or used to be light tan?

Either way, the only thing I know of is to try to dye it back, and odds are, you're either going to dye more than you wanted (darkening the edges) or miss the edge ... either way, it's going to miss, and won't be 100% restored.

I'd consider rearranging the furniture (ie, hide it with a couch), or put a throw rug overtop if it's in the middle of the floor.

If it's in an area that's prone to issues, you can always replace just a section of the carpet with some other material -- at my mom's house we put some hardwood down just inside the back door where the cats liked trying to dig their way under a door, rather than replace the whole room.

Anything you do to dissolve the paint or with a pressure washer will also remove some asphalt.

I'd vote for a good pressure washer, as tar can be messy stuff since it too will probably dissolve under the action of paint stripper. Rent one if necessary, BEFORE the paint has had time to harden is best.

Once that is done, however, you will still be left with an image of what you stripped off. So I'd next take the opportunity to apply some blacktop sealer to the entire driveway.

Finally, ensure that the kids who did it will not repeat the action. Their paying for the work will help in that respect. If they are required to help do the repair itself, that would be best.