This board is more like getting a group of people who are in the same community as them to speak on the topic of in-game behavior. Generally asking for opinions of others of the subject of other or their attitudes. The majority of players that do come here mostly looks for solace for their penalty or generally asking if they deserve it. Also, this board can show you what attitudes you can take into games. Learning what to do and what not to do. Knowing the boundaries and learning the ropes of what could lead to a penalty. Also learning how many penalties there are, what players could do to bait you into getting a penalty, or generally learning how to act when/if a player trolls you. Knowing the situation and how many players before you handled it. Or players come here to see how many players do get a penalty from Riot's system and how often.
This board, as any board, gives you information on the topic.
You can learn, see, give advice, or simply give out your opinions. A lot of players don't understand, ignores, or simply not aware of the Terms of Use rules.
A lot of players comes here looking for support hoping they can gain some sort of protest for their penalty and hoping Riot will lift it if they get enough support. Players do come here because they're looking for a quick answer since Riot Support takes awhile to respond.
This board exists for many reasons I may not have named.
But the majority of what I've mentioned is what I've witnessed and learned since I've been here.