TheBellJar said:But that is the thing, there aren't a hundred posts saying "Apple is awesome". People don't bother posting futile nonconstructive things like that.
Actually you'll be surprised how many posts are indeed that way

Its just that the mods stumble upon them first and delete them.
If people are enthusiastic enough to type out 1 liners, I highly doubt someone with a well thought out opinion will be held back to simply like someone else's post. It won't have that much of an effect, but on the contrary might encourage the silent lurker types who aren't good with responses to show their opinion in a way.
In any case pay no attention to the hearts or any of that, those will obviously be tweaked for something more sensible, you just need to pay heed to the concept.