My first thought would be to work with the distinctions donk mentioned. Everything possible should be done to enable and encourage downtown and neighborhood merchants to conduct daily 'sidewalk sales,' given that the design of the district makes this feasible. Designate an outdoor display or dining area on the sidewalk. Don't require a permit, or if you do, make it an annual one. At the same time, I would look at ways to restrict the Wal-Mart parking lot from becoming a big flea market. Some ideas are to limit outdoor selling to specific locations and even enclose these in decorative fencing, to prohibit or restrict outdoor displays of merchandise like hte big trampolines hung on the front of the building, and to require that 'flea markets' be held in specific locations, such as a a fairgrounds or park.