Can someone help me understand why naming and shaming companies for what is in the customer's opinion poor behaviour deserves down-votes? No sarcasm, honest que

Can someone help me understand why naming and shaming companies for what is in the customer's opinion poor behaviour deserves down-votes? No sarcasm, honest question. Were the down-votes for something else? I honestly think some naming and shaming would be a good thing in situations like this. Especially in this day and age when complaining on twitter is more and more likely to get a response from the company in question.