Yes, it happens and it is wrong
No, it's completely okay
Maybe, it depends on the situation
I was discovering that life just simply isn't fair and bask in the unsung glory of knowing that each obstacle overcome along the way only adds to the satisfaction in the end. Nothing great, after all, was ever accomplished by anyone sulking in his or her misery.
"He who does not think himself worth saving from poverty and ignorance by his own efforts, will hardly be thought worth the efforts of anybody else." -- Frederick Douglass, Self-Made Men (1872)
I do notice peoples lean, if they opt to put it up. But I don't have a problem with people having leans I don't particularly agree with. Its not as if I have some pressing urge to track down and only debate against particular leans. Also, your lean is open to personal interpretation. I've seen a few moderate/centrists that are pretty liberal by the content of their posts and how I interpret the varying leans. Likewise, I am sure I am considered to be conservative in my views by many people, rather than how I interpret my overall views as being independent of party/ideology .
All in all, I am aware of it, but my judgements really come from the interactions with people and the content of their posts.
"Loyalty only matters when there's a hundred reasons not to be-" Gen. Mattis
"If your opponent is of choleric temperament, seek to irritate him." - Sun Tzu
I am more interested in what underpins a person's beliefs than what their stated opinions are. Most don't even know themselves....and remain silent when asked. Some become frustrated when asked...and retort with insults, but most just ignore the questions and, hopefully, are doing a little introspection.