Is spreading someones real life name around in general chat wrong?

[Mizunoko]

I will give context to this. I give my real life name out to no one and i mean absolutely no one in relation to this game. I am very confident that there should be 0 people on my server who knows my real name. I was standing in limsa earlier talking to friends and these people come up and hang out with us so i figured okay why not then randomly one of the guys who said something to me included my name into what he said and i know it was no coincidence he knew my name. Now i know this may sound like no big deal to some who don't care about that type of thing or maybe they are more public types of people, however i am a very private person and never give my real name to anyone especially in game. So i am hoping some of you can understand why i was a little more than creeped out by this. I have no clue however if this is a just block them and move on situation or if i should contact a GM about it. Because i think a persons name can be considered private information? And isn't spreading someones private information around in general chat somehow against ToS? I have no clue so i am posting this here in hopes that someone can tell me if i should just shrug this off or if i should seek help with a GM. I am too creeped out to not ask around i need guidence. Any help is appreciated. Thank you.