Report function flawed?

I am not sure if I uploaded the pictures correctly, but if I did they should show in the imgur.com url you find at the bottom of this post. If there is another way to upload pictures, please do tell.

I made a support ticket a while back (my first due to it being such a hassle) because of a player being very verbally abusive in post game lobby as he kept it to a minimum during the actual match. What caught my attention is that even after attached picture which contained the name of said player (which is not allowed for me to display) and some of the messages he wrote. I got the reply that:

Sadly, we can’t often take action on reports sent to us through tickets, but we created the Instant Feedback System to help us track when a player is consistently hurting others. Even if you couldn’t use the report feature for this game, please keep using it when you can. Reports you make provide us with valuable tracking information and help to escalate players to our attention for investigation.

Does this mean that stuff written in the post game lobby is your "freepass" to act almost as toxic as you please? Due to it not being a valid report ingame. I am aware that they might not be able to do anything from a picture (due to photoshop, etc) because they do not have/want to spend the resources from it.

But why isn't the report you do at the end of the game involving both Pre match, match and post match chats? This system seems a bit flawed in that way.

Anyone that could shine some light on the matter for me? I have gotten some great responses on my earlier posts.

http://imgur.com/a/tauJC ""Post game Lobby"" http://imgur.com/a/u3bm6 ""Riot response""