I take it you witnessed an accident caused by someone rolling a stop sign at 2 mph?
bu!!$hit.
I'm not talking about rolling one at 10 or 15 mph. I am talking rolling one at 1 or 2 mph.
The only exception to this rule is one particular stop sign I pass through on a daily basis that has terrible sight lines in both directions. Infact, you can't see to the right until you are literally with 2 or 3 feet of the intersection. I do stop at this stop sign.
Anyone that would ticket someone for a 1 mph roll with even decent sight lines, is a fool. Well, actually, they may just be doing their "job" which is filling a ticket quota, not safety enforcement.