We can all agree it isn't constructive in the slightest, yes?
What?? Icelyn just told she/he liked a thing. What do you want to be constructive? Voting using a poll is also not "constructive", in terms of expressing one's opinion, but data gathered from a poll is valuable. Consider her 5 cent to be a poll vote.
It's an understanding most of us learned early on in school. Both "I like this." and " I hate this." do not count as constructive criticism. Is every comment here required to be constructive? No, of course not. However...we should be honest about the nature of commentary.