Not to be argumentative, but rather food for thought....I'm guessing that when the forklift tried to pull out those anchors it was hooked fairly low to the ground (please correct me if I'm wrong).
DocZ
Actually we tried it in all sorts of areas. What we were pulling at the time were walls that were cut at the cieling and just tied to the ground with anchors. If you can believe it we were demoing the Federal Reserve Bank in Portland The stuff I saw that we took out well lets just say who knows what we tax payers had to pay for it Most of these were frames that at one time had bullet proof glass in them and sliding doors. Basicaly I would hook a tow strap to the things and then to a forklift and kind of like a skier would say hit it and off went the forklift. Sometimes they would move and others well lets say it took a few pulls.
I know what you are saying about te average thief. Most will take what is easy to get to. But like they say locks are just to keep the honest people out. I do know when my safe goes down it will have at least 4 Hilti anchors on hte floor and who know how many into the wall