Seems like league of legends doesn't understand "competitive play". Obviously there will be arguments, and trash talk. it's just how it is when you want to win, and hate losing. Riot has been banning ALOT lately, it was never like this before, or never near this bad. Sounds like they are trying to just perma-ban as many people as they can so you are forced to remake a new account and buy RP. Only reason i can really think of, and yes i know obviously some people deserve a perma-ban, aka -12 year olds who spam, and running up mid feeding.
Don't ban people trying to carry teams, then telling that one guy who runs into the enemy jungle with no wards, gets caught, and is dead for 50seconds. that he's an idiot.
Thanks for the 3day ban? yeah. Now i'm going to mute everyone on my team everygame, and just play with no communication, seems like that's what you want.