Firstly, just because I don't like your opinion does not mean I'm "worked up." And, yes, your opinion does matter. When it's time to vote for these things, the more people there are like you, who go out of their way to avoid really basing their opinion on anything reasonable, the less likely it is that anything gets done. I live in a democratic country, and so the purposeful ignorance of others does affect me.

Saying you don't like it is fine, but saying you think it should be illegal for everyone because you don't like it is not cool.