Puts pressure on Target to stop cooperating. The public has a lot of power to influence change this way when coordinated. This is also more effective than a boycott since it is disruptive.

It’s a denial of service.

Dude, they DoS-ed a store. They bought a shit tone of salt then returned it. Wasting the cashier’s time, the return person’s time, and the stocking person’s time. Making those employee’s waste time instead of helping actual customers buy stuff, return stuff, or stock actual things needing to be restocked. I can imagine a lot of real customers are going to get frustrated and just leave costing target real money