This is the point I was trying to make at https://news.ycombinator.com/item?id=32769925 by quoting pg's 15-year-old bit about how empty positive comments aren't so bad (https://news.ycombinator.com/newswelcome.html). It's true that they don't contain any more information than empty negative comments, but they don't degrade the threads the way empty negative comments do.
Unfortunately people took that as some sort of pro-monarchist stance!
"Empty" praises and supports for one side of the position - a political position in a complex issue, not just "Thanks" like PG writes - are not really empty, they're the tools of populist campaigns.