I learned this weekend something that was new to me. There are charges that the Coca-Cola company has played a role in executing people that attempt to unionize in third world countries, particularly Colombia. I was aware that Colombia was the world leader in execution of union organizers, but I was not aware of Coca-Cola's involvement. Some details are here.
Of course Coca-Cola denies the charges, but it's interesting to note that 23 universities have banned Coke products, including my alma matter, the University of Michigan. That's rather astounding when you consider how interested universities are in getting money. Coke's denial of the charges of course mean nothing. That's to be expected regardless of the validity of the charges. These university actions mean something because a priori there's no reason for a university to single out Coke for a boycott. If I had to bet I'd bet that Coke is guilty. The documentary "Life and Debt" shows video footage that is claimed to be a violent break up of efforts by factory workers to protest their treatment with a work stoppage in a Latin American country. This is the kind of thing that happens.
So consider that when you purchase cola at the store. Pepsi may also be awful in similar ways, but I don't have suspicions of them being involved in executions. At least not yet.