[acgIssues]

This is fine for most people; the "interaction" nowadays (likes, retweets, ...) doesn't really represent support but a lack of communication skill from the consumer.

When someone likes something without anything to say it's just a metric, doesn't bring value to a discussion.

[ghthor]

This isn't true, it can be a crowd source quality control. Not as good as a direct share from one of my trusted colleague's, but it does work as a quality control given the right community makeup, the right web of users.

[acgIssues]

Which is difficult to control over a social network unless it's a closed community and still, it's used as a metric.