I understand the connection to slavery in the word plantation. In fact I think most people's first thought upon hearing the word plantation would be slavery. That does not make the word racist. The definition of racist is, prejudiced against or antagonistic toward a person or people on the basis of their membership in a particular racial or ethnic group, typically one that is a minority or marginalized. That's it. If it was say, Plantation Rd somewhere in the deep south, well that would probably upset a lot of people and rightly so. There was very little slavery here in the northeast but there were plantations here before slavery came to America. Plantation then referred to a settlement like Quinsigamond or Quaboag. It also referred to agriculture something that remained in that part of Worcester until the 1950s. So besides Plantation St referring to the 1600s settlement and not slavery there's no rational argument to change it. I think there's altogether way too much of this racism McCarthyism. You're just not going to find racism under every rock. When something like this is overplayed it's reduced to noise and people tune it out. Racism is a serious subject that must not be ignored but you need to know what you are talking about and not just casually toss it around.