Say that someone (Reuven) posts something on here. A person (Shimon) votes to close it.
Now, someone else (Levi) comes along, sees this close vote, and disagrees with it. So he might comment on the post and ping Shimon why he thinks the post shouldn't be closed.
Is there an issue of Rechilus, saying something that makes one person upset at another (see Chafetz Chaim, Rechilus 1:2)?