I agree with his cause -- excess packaging really bothers me. But this isn't the way to handle it, and I agree with previous posters that it just puts the problem on the store workers, who have nothing to do with packaging decisions.
What I do is I refuse to buy products that have excess packaging, and I write a letter telling the company why. For example, I bought store brand peppermint tea from my local grocery store, and when I got home I discovered that each individual tea bag was wrapped in plastic inside the box. Yuck! So I emailed them explaining why I wasn't going to buy the tea again, and suggesting that they reduce the packaging, because it was delicious tea and if it weren't for the packaging, I'd be a repeat customer.
No idea if my one letter made a difference, but surely if everyone who was annoyed by packaging contacted the supplying company, they'd take it into consideration?