Loblaws may to try to bait you into doing more. You don't need to protest. You don't need to be anywhere near their stores. You don't need to cause damage. You don't need to talk to or harass the employs. You don't need to shame the employs. You don't need to be angry at or stop other shoppers from shopping at Loblaws stores. You don't need to figure out how Loblaws is going to lower prices. You don't have to worry about solving possible obstacles Loblaws may have.
You already know you want lower prices and it isn't up to you to tell them how. Simply boycotting is what will work right now. It is very hard for Loblaws and the media to put a negative spin on a boycott. It is up to Loblaws to make changes to and it is up to each individual to choose when the boycott is done for themselves. If Loblaws refuses to change more people will likely choose to join the boycott.