How do you get rid of buzzards?!!

Ok. This is kinda of a long story but I will try to shorten it up for you.

My grandfather owns 100 acres here in MS. When he first first bought it from a guy who owned his own timber company, he noticed a lot of buzzards hanging around. (when i say alot i mean over 100) He didn't think anything of it. Thought something died but they would eventually move on.

Well since he bought it this past spring these buzzards have produced the following problems:

1) he rented bulldozers to clear the land and the buzzards ate the foam out of the seats. Cost him over $200

Even put a trash bag over the seat, they pulled it off and ate the seat

2) bought a brand new tractor - put a tarp on the seat of it, they crapped all over it

3) ate laminated sign off his fence that had his address on it

4) and the BIGGEST problem-

I had bought a $40 blind at Walmart and put it out. It was only hunted in twice by my dad.

Well my dad hunted in it on Saturday evening. Well we went back Monday afternoon on the 4wheeler to check our camera and my dad looks at me and asks where is the ground blind.

I thought it was further up the road, but he insists we passed it. Well come to find out my blind is gone. Nowhere to be found. The only thing laying there was the white tag on the ground like a tag on a mattress. My Coleman chair was laying on the ground. And a bunch of buzzard tracks.

The buzzards ate the whole ground blind! In under 2 days!!!!
The zippers, the poles were even gone! My dad said the buzzards knew it was a cheap blind so they put it out of its misery.

We found the bag that the blind came in and for the stakes and it was in shambles too.

Just wondering has anyone had anything like this happen to them or was Hitchcock right?