In a message dated 3/13/2006 3:39:55 PM Mountain Standard Time, 
[log in to unmask] writes:

> On at least one occasion, when looting was a real issue, we found a  
> deputy sheriff does wonders in terms of deterring "collectors". If  
> the site is reasonably important and not going to be open for too  
> long, police may be part of your answer.

We attempted to use this when we were doing our excavations.  In fact, the 
Police Station was on the adjacent block to our work.  Unfortunately, they were 
not too interested in pothunters unless we could get the property owners to 
sign a complaint.  The owners really didn't care.  I ended up spending a weekend 
running off various looters myself.  That is why I think Ron is right in 
suggesting heavy steel plate, parking cars over excavation areas or, as we did, 
laying rented chainlink sections down over features and weighting down the 
fencing with whatever you can find.  Its not perfect, but can help in detering at 
least the more casual of looters.

Mike Polk
Sagebrush Consultants
Ogden, Utah