I completely agree with this. I've run into multiple people on multiple occasions throughout Solo Q that are known to AFK. And guess what? They AFK'd within the start of the match. I've had 2 AFker's in one game before. I fell from S1 in my promos to G5 because of Trolls that wanna sit in base and type arguments, or AFK/DC purposely. -- Hell, maybe it's just my bad luck. But I play at least 10 Solo Q games a day, and majority of them have been loses due to this reason solely. Sure I have legit losses as well, not gonna lie there.
But anyways, reporting obviously has no affect to these people because they do it anyways, fully knowing people are gonna get mad and report them. Why should we all have to suffer and lose LP because of them? WE ALL KNOW Solo Q system is FAAAR from perfect, but I'd figure getting some duct tape fixes AT LEAST to hold us over until a better system is put in place.
As for legit DCers. I understand if it's a random DC, or if the servers screw up. It's a bit of a double edged sword, naturally. But I still feel the pros outweigh the cons by FAR.