Greg,
This is not different then any other year
?? The BUB crew when they drag find stuff and pick it up,, You are more then welcome to police and walk the full 12 miles of the international course if you would like to pick up any FOD you find... If you are that worried about it....
Sometimes or most generally somewhere along the line the courses cross, Its a fact of usable space on the salt, crosses the BNI courses.
Second, The BNI does a really good job of patrolling the courses, and picking up stuff...
dont blame the BNI folks or others, anything can happen, and Ive seen more stuff left out there from Movie and TV crews for private filming then anybody else...
Jack is correct of the cigarette butts, I'm a smoker, and I have a pissed off wife cause when she empties my pockets for laundry she finds them all...
And by the way, BUB is pretty much limited to the International course for a full 12 miles, so I dont know what you are impling by virgin salt... International course has been used for 50+ years....