Setting aside the fact that you're totally insane, lets run through what you just wrote.
1. If I say something is always bad, i believe that to be a fact
2. If I say something is bad for me and not others, thats an opinion
3. If I disagree with someone elses opinion, it is a fact
so, following that logic
1. You are an octopus
2. I disagree with you when you say you are not an octopus
3. Meaning it is now a fact that you are an octopus
Step right up folks, i've just discovered my new found power: If I disagree with someones opinion, my opinion on the same matter becomes fact.
Seriously? Run your head under some cold water.