"It's just an opinion of mine~~"

Seriously, ask yourself this. Have you ever heard of the phrase, "in my opinion,...","it's just what I'm thinking..." or something like this? What exactly is the purpose of stating that the following speech or thought is just something personal? By stating his or her stand, that it is all simply a personal thought, the person carries the burden of responsibility of the speech. Listeners might feel safe; they are simply listeners, anything crazy he or she said is just them. On the other hand, any glory taken by the speech is only for the speaker and nobody else is supposed to take credit for it. This seems to be a self sacrificing way that guards everybody's interests. It's a win-win situation: you get to listen and comment on what he or she says without offending others and the speaker gets to express him or herself. Now look deeper. Why is the phrase truly needed? If it's spoken by someone neutral or of higher status, the accentuation actually would awaken a hidden instinct to hear and have higher recognition of the speech. Humans are a social pack; we would rather follow the crowd than go against it. Unless you have a streak for going against the norm, the phrase would actually press you to believing the speech. On the other hand, if the speaker is deemed inferior to the listener, the accentuation would rather have a negative effect on the speech instead! Notice the effect of the phrase on the listeners: you will notice the subtle change of body language and then there's where you step in and resume listening, without the subtle psychological compulsion to adhere to the speech. We control our minds, not the other way around.