The purpose of leaving items at the front is to serve as a punishment to the company for dissatisfactory service. The only way to punish a corporation is by hitting their bottom line. The more people who leave a full basket at the front the more costly it will be for Walmart. Instead of making a profit Walmart will loose money by having to pay someone to restock the items. If anything I'm ensuring more work (and therefore more money) for more people. Eventually Walmart will realize that it is cheaper to provide satisfactory service than to make people wait in long lines like cattle.
Hmm, you really believe that? Trust me, Wal Mart didn't get to be the most profitable retailer in the world without studying exactly how many and what kind of employees are profitable. Your actions hurt no one but the minimum wage slob who has to go around cleaning up behind you. Wal Mart could not care less, and your actions won't even make a dent in their radar, even if you had a 1,000 people doing the same thing. You're simply being a self centered asshole looking for a petty cathartic release.