Snaggers will always find a way to beat the system, which is why the rule book should read "no snagging" plain and simple. The key to stopping snagging is to have an educated and knowledgeable enforcement presence in the areas known for this behavior who are willing and able to deal with it.
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I am still not a cop.

EZ Thread Yarn Balls

"I don't care how you catch them, as long as you treat them well and with respect." Lani Waller in "A Steelheader's Way."