Hi there, I took some time and did you a favor in reviewing these cases you claim are innocent for you.
In Case 1 This player took a normal game function and used it to harass his team and his opponets. Also in game 4 "I know you gay Akali noob i know gay".
In Case 2 In game two as a support he decided he would take cs, his adc was not cool with it but he decided to do it anyways and then complain about the consequences this is refusing to communicate and helping the enemy team. Did you look at his score in the 4 games? It is so obvious that he intentionally fed. In addition in several of his games he was overly confrontational with his team mates looking for a reason to put them on ignore.
Because they did these things in these two cases and broke the summoners code they do deserve this punishment. LoL is a free game and we have to sign a EULA saying we will follow the summoners code in order to play. If you have any questions on how the tribunal works please take a look at my guide in the guides section. I hope this explained some of the reason behind their punishments take care and good luck my friend =)