They are by their nature divisive and tend to make people upset and/or angry. This coarsens the atmosphere and makes reasoned and intelligent discussion far less feasible.
This is Hacker News. Maybe I am projecting something here, but I thought of us as explorers of ideas. Do we want to prevent, to silence, discussion?
The problem is that it would only take a few people who can't remain rational for a tipping point to be reached whereby the overall quality of debate badly degrades. (That's when some of the most valuable contributors start to disappear.)
>What will we do when an issue is both important and divisive
If such a political issue affected hackers directly then there'd be no way to avoid that discussion.
>Do we want to prevent, to silence, discussion?
Of course not. And that's precisely why politics in general should be avoided.
Aside from the eve psych, I'm with Eliezer Yudkowsky on this:
That's what downvotes are for. That's why we should refrain from downvoting for disagreement and keeping it for shorting out comments that are damaging to the discussion.
It's dispiriting that this article hasn't been flagged off the site yet.
Note, however, that this study only selected people who responded as willing to participate in a "two-week study on prison life". That sounds appealing to some people more than others. Then again, so does military service.