Unlike Reddit, no action is taken upon a certain number of "reactions". Your comment isn't censored after receiving an arbitrary amount of :-1: 's
+1
;)
Groupthink: You mean a community that downvotes a comment about X suddenly has a positive notion about X because the votes are hidden?
An example to others: I see this as a good thing - it lets an outsider get a good feel for what community members like. A number is much easier to parse than thousands of comments.
"Shitting on others" is a very melodramatic way of "people saying they don't like a comment with numbers".