If this is a trial balloon, an outright fantasy or the real deal doesn't matter. It's nice it was printed for wide distribution and it makes you think. The proposal isn't terriable, it could even work. 15 years to withdraw is too long, and it's unreasonable to expect Israel will open a DMZ buffer on their own soil.
Justice Ministry: Information examined by AG about Gal Hirsch didn't come from police (Haaretz)
from the article: Olmert: No government officials involved in secret Syria talks