If you rank the top 500 things in order of severity, that would be the one of the lowest things.
They pretty much own the water supply in one South American country. You can't collect rain water off your own roof and drink it. It belongs to Coke.
They are accused of telling people to quit their unions or be killed, and then further accused of actually following through with it. ther e is more than one case of this, in several south american countries.
http://en.wikipedia.org/wiki/Criticism_of_Coca-Cola#Bottling_plant_murdersThey are accused of using highly polluted waste water (to cut costs) in some of their over seas bottling plants.
They had Nazi ties.
I could go on listing stuff all day, and of all the stuff I am aware of, it seems to not even scratch the surface.
Using polluted water, killing people, making coke cheaper than water in some countries, lawfully owning every drop of water, etc, etc, is qualified as poor interaction with customers.