just becaus the mall has a lane that you drive on doesn't make it a road, the rows of parking spaces aren't roads, and the lanes of travel that are right next to the curb aren't neccessarily roads either.

not only do you have that she wrote down the wrong number but you have the fact that nothing says it is illegal to have a modified muffler, just because the muffler is modified doesn't mean the polution control portion of the exhaust system is, and if she says you had a modified exhaust system how would she know, she never looked.