This statement is completely incorrect in multiple parts. Part I- Goodwin was booed for his part in a horrible half of football. There is no form of "ownership" exercised in booing here. People pay money to be entertained and they were not entertained, they were frustrated at seeing a team play with no skill, pride or passion.
Part II- Professional athletes are people in their free time and individual corporations when working. An athlete's twitter is part of their "brand" regardless of what you believe. Does Goodwin have 39k followers because he's a nice guy? No, he has them because he is a football player. Want proof, look at his banner image and his bio info. To say an athlete has a right to say whatever they want on twitter without a backlash is an outmoded way of thinking. If he wanted his comments to be private, he could have used a private twitter account.
No, he said what he said because he wanted to hear people suck up and say they never booed and they support him. In short, he had his feelings hurt and he turned to one of the places in the planet that will absolutely tear you apart and mock you when you ask for sympathy. How do the people who booed assume "ownership" over players for dumping on a player who dumped on them?