(usa) is it legal to rent a billboard and put up someone's tweets

scenario: you know a chud at your workplace. he shows you a 'funny' meme on his phone and you peep his twitter handle. it's LoliHitler88. you hate this guy so much. can you put his real name and face on a billboard next to his greatest twitter hits if you don't call him any names on it. is that considered harassment or free promotion. this is a hypothetical