Sounds like you are just twisting the definition of opinion to justify this behavior. Objectively, it is independent of actual objective fact, it is by it's very nature the complete opposite, subjective. A child can have the opinion that Santa Claus exists a Christian can have the opinion that god exists, an investor can have an opinion of future events that cannot possibly be related to objective truth yet. Words can have multiple meanings, but even ignoring the ones that agree with me, I can't find any that agree with yours except yours.
If that's what you are doing, then I have more respect for the people who go "lol lets see what opinion they post now", if only because one has more a shared reality to it.
Your argument only apply to downvotes - I'm curious, any opinion about the upvotes of unconventional but otherwise popular opinions?