Do honors even do anything?

So I've been wondering for a while now, do honors affect your honor level at all? I don't care about my honor level, but it's interesting. I main support, and there's the unofficial adc/support pact that they honor each other when the game was not bad. Because of that I get at least 1 honor in almost every game I play. And yet I'm honor level 4-2 right now, while I've seen many players with honor 5 already. It seems that you just get a stready stream of honor level progress over the season, as long as you don't flame.
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