[doug4hn]

Some are just stuck because they can't go elsewhere because of traffic jams and they don't want to go inside because it's too crowded or too many people waiting in line for coffee (or to go to bathroom).

Afraid I've never heard of anyone being accosted by officers about hanging out in the parking lot inside their car w/ their computer. Who is to say who's wifi they are using anyway (especially in a tight area where you have multiple choices for wifi)?