These restaurants are un-health, filled with horror stories like people getting their burger spit in, and people still eat there. You might be underestimating h

These restaurants are un-health, filled with horror stories like people getting their burger spit in, and people still eat there. You might be underestimating how much people want their cheap burger. Either way, if that does happen the chains will either have to react or competition will pop up. Both sound like good things. Likewise, they will undoubtedly try it in a few stores first to figure out the impact. So the risk to them is low.