Autolocking/Instalocking

Hello riot employees. This post is primarily directed to get a verdict towards something that I am unable to find the answer to anywhere else. This has to do with the concept of autolocking or instalocking, where in blind pick, a player on one team states in chat that they, for instance are going to go mid lane, and then another champion then autolocks in a mid laner and then states things of the nature of "no I'm mid" or "F*** you go bot etc."

This also raises the question of whether things that are said in pre or post-game chat count towards reportable offenses. Such as a player was completely fine in game and champion select, but then begins to flame teammates/enemies etc. in the post-game lobby. I also can't find the answer to this anywhere, so if someone has a link to an answer, or if this can be answered by a red, than that would be great.