Why is this relevant? Not every site I read is in English either, but that doesn't make the OP's point invalid.

Just thinking, there could be a counter on how many times someone "changed opinions".

As a side though, if somebody keeps changing opinions on a given topic, it would be somewhat sensible to lower the effect of such votes.

Nothing.

The ability to change opinions is an important difference between rational and overly stubborn people.

Sometimes I can be convinced during a discussion. Then people are often very surprised that I change my opinion at all. Then I wonder why the bother to discuss, if they don't expect me to actually change my opinion.

So much of the media we consume is heavily editorialized to hit an emotional chord. This makes sense from the author's perspective - an argument with a strong pathos can help it get noticed. I will often react instinctively at first, then take some time and reconsider and form a different opinion. Sometimes I read an article on HN, then go to the comments where someone states a counterpoint I had not considered. Especially on a this forum, one should have the chance to change a vote.

Well, if you change your opinion, that means you were WRONG! And being wrong is... well... WRONG! Don't you see?! You can't let people see you being wrong, man! They might think you're human!