I went into ARAM and it said one person was not connected which is normal at first. Waited and waited. Turns out the game crashed or I disconnected. Came into it mid game. After we won I saw I was reported for AFK. Had to type I Agree to continue. Now do i have a strike or something? It was not my fault :/ Please and thank you.
You get off the first time with just that warning, but if it happens repeatedly you'll end up with a low priority queue. The system works whether people report you or not; the report for AFK is basically for people that remain connected but don't participate and the system has trouble catching them. You can read more about Leaver Buster here; https://support.riotgames.com/hc/en-us/articles/201752714-LeaverBuster-FAQ
The first thing has no consequence whatsoever. It's pretty insulting tho when it's their fault.
