I didn't downvote, but I think the issue is that you made a comment where you stated an absolute, then proceeded to follow it up anecdotal evidence. As former visa holder, this never happened to me, and I moved between countries all the time.
"...where you stated an absolute, then proceeded to follow it up anecdotal evidence."
If this is about the "similar things happen..." part of my comment, I guess you're right. I changed it to "similar things can happen...". I'm trying to point out that the fact that she had a visa problem could also have been due to a technical fault (though it sounds like it wasn't, in her specific case). It still doesn't change the feeling of intimidation and unwelcomeness that is most apparent at the CBP.
"...As former visa holder, this never happened to me, and I moved between countries all the time."
By their nature, such incidences are going to be rare. If this was the experience of every person at immigration, it would change pretty quickly. In fact the problem is that because it is relatively rare, there tends to be an air of disbelief towards people who speak up about it.
