Would it be permissible to place a giant billboard on the sidewalk right in front of your competitor's store? It's unethical and anti-competitive to try to dro

Would it be permissible to place a giant billboard on the sidewalk right in front of your competitor's store? It's unethical and anti-competitive to try to drown out your competition because you have enough money to be able to do it. IMO both Google and Facebook should be punished for allowing it and doing it respectively. It shouldn't be possible to bid for your competitors' names.