“It Is Set In Stone”

I have met some people who gave my opinion about a matter. We never spoke about the matter, but they convincingly stated that it was my opinion about it. After they gave their so called my–opinion, they would find me where ever I am then ask me my opinion about the matter…
When I am asked forwarding questions, I don’t ever have an opinion. After I told them that I didn’t have an opinion, they would suggest different scenario then ask me what I thought about it… I don’t ever take the bait and they usually give up, but their suggestion about my opinion is already set in stone…