True. 
But it is nice to hear everyones opinion and gauge the atmosphere. 

> there are some people who only want their opinion to be heard

I'd say that's pretty common, regardless of topic. Most people prefer talking to listening.

Undisciplined

Some opinions are interesting, but there are some people who only want their opinion to be heard.

Feature Idea: Wiki post types

Some opinions are interesting, but there are some people who only want their opinion to be heard. 
Quite radical, if I say so myself. 