It's not that our children never do anything they shouldn't it's that we take at least some responsibility when they do. My DD is 8 and she's been told since she was old enough to walk not to touch anything in a store unless she asked first. It doesn't matter if it's the dollar store or Tiffany's the rule is the same. Has she always lived by that rule, of course not. However when she hasn't and something got broken or she got hurt I didn't blame the store for having the item there. I blamed myself for not watching her more carefully and DD got a lesson in why the rule existed in the first place. Now with an item like the lighter I might have suggested the store rethink the placement of the item but I wouldn't blame them for having it out within the reach of my child.
Very well said, and I agree completely. I work in retail and our front counter has a lot of candy. It's really rare that kids are standing patiently with their parents, but when they do, it's pretty awesome. Things get opened without permission all the time and during my entire shift, I hear:
"_________, put that down."
"I told you no candy, ________. Put it away, please.
"What did I tell you about picking up things that aren't yours, ________?"
"No. That's not yours. It belongs to her." (Me, I'm guessing? I hear this one a lot.

)
"PUT THAT DOWN!"
I have to say though, the candy is stocked under the counter for a reason- it's eye-level for kids, who in turn get their parents to buy it for them. On the other hand, I understand why the lighters are at the counter too. (Quick access for smokers when paying) A decision like moving the lighters further back on the counter, (further away from small hands) isn't as big a deal as moving an entire aisle to the other side of store, and shouldn't require corporate involvement. In my opinion, the OP should have just spoke to a manager in a non confrontational way. Something along the lines of, "It can be really easy for kids to mistake the lighters for a toy, can you arrange it so there isn't a serious accident in the future?"
I understand that you want your kids to touch whatever they want without worrying that they get hurt, but it's impossible to control any situation 100%. The way I learned I shouldn't horse around with my brother at the top of the stairs was by falling down them. I'm not saying every child should learn in this fashion, but letting kids know they shouldn't touch things that don't belong to them can go a long way.
Why do you think your coffee from McDonalds now comes with a warning that says "Caution: Contents may be hot". It's because somebody didn't have the common sense to know that she shouldn't put a hot cup of coffee between her legs and decided it was McDonald's fault - not her own.
Not related to the OP, but when I found out about this a while back, I was so infuriated..

People will do anything to pass on the blame.