I'd start with investigating whether there were lawsuits against stores, settlement cases, what were financial losses etc.
Interesting advice, thanks.
I have no idea about gathering that kind of info, isn't it closely guarded company secret stuff? Obviously nobody wants to advertise those kind of stats.
You're right though, it would be compelling material!
I've had numerous run ins with stores here over the past few years and am of the conclusion that in general the rules are:
1) The customer is always wrong
2) The customer is a potential criminal.
Last weeks trip to a large electronics store ended with me having to pass through the alarm system about 10 times, handing the security guy my phone, wallet, coat etc. It turned out that a scrap of foil chewing gum wrapper in my pocket was setting it off!!! The obligatory crowd of onlookers gathered and I felt utterly humiliated! Still can't understand why it didn't go off when I entered the store?