It may depend on your state law, but personally, I would not touch it.
1. Not your property, belongs to the cable company
2. The cable company likely has a permanent right of way to have the box there on your property
3. If you fool with it, they may cancel your service if you have their service
4. You could disrupt your neighbors service if you move it, this will not endear you to your neighbors.
5. You could get into legal problems if you mess with it (who needs (expensive) legal problems?)
6. If you ask nicely, the cable company may be happy to move it for you.
Give the company a call, and see what they will do. If they refuse, contact an attorney, and see what can be done.