It's just fine, people are making fun of me openly in FC chat so I guess what I'm talking about is a total non-issue. So don't worry about it, because nobody cares.
It is an issue though and this isn't the first time this has happened. People need to stop shaming others for how they want to experience the game. Who cares how obvious it may or may not be who the final boss is. If someone doesn't want that ruined (such as yourself), then they have every right not to be spoiled.
People here need to stop justifying this stuff, too, by making fun of people and then being like "Well it's okay they should have known to begin with." or whatever cause guess what? It's not okay. People need to learn to have a little more respect for other people. I mean, I get maybe saying it without thinking about it, but the appropriate response is to say sorry and move on, not make fun of the person and try to make them feel bad.
That being said, you really should delete that spoiler- just because people were jerks about it and ruined it for you doesn't mean you need to do the same for others.
edit- I will say, I don't feel like there was any intention of harm or anything in what was initially said- my main issue is the people coming after who feel like they have to make fun of someone being displeased about what was said. And a lot of my annoyance is a combo of some of the stuff I've seen people say now and a lot of what happened the last time as well.