Riot support is a bunch of spambots
Edit: I just received a 5th response which was the EXACT SAME MESSAGE word-for-word as the second response I received. So I am 100% confident in my allegation that no real person is working those support tickets. Use my experience as a warning.. you're not being listened to.
As Jubbinaut said in his reply down there, though, the system supposedly detected something wrong. I understand typing "I agree" was just a warning, which is why I typed it instead of refusing to. But I in no way left that match even for a minute, I didn't troll or do anything that was not towards the aim of winning the match. The only time I was sitting around idle was when my champion was dead and i was waiting for them to respawn. Like always, it seems Riot is releasing product before applying enough to tests to render it functional (every new champion is an example of that).
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I'm either being trolled by the support staff for having a bad attitude (it was a test to see if they'd acknowledge the attitude), or sending in a ticket is only mass answered by a server of bots and pre-written messages and pre-written reply messages.
LeaverBuster made me type "I agree" for leaving/being disconnected from a match. However, the last time I disconnected from a match was in September, probably August, when League was having DDoS and other server problems. I doubt they're issuing punishments from that long ago. So I sent in a support ticket, not to get anything changed, but to get information on and let the support staff know that "Hey, Leaver Buster is flagging me for no reason. Look at my account and tell me if I'm wrong, or acknowledge LeaverBuster made a mistake and you'll aim to fix the system."
After this experience I'm concerned as to why Riot even has a support system.