Obviously you haven't read my complete comment or didn't understand it. I have never said it's alright neither have I said Saitou was a good guy. Inoue definitely should be adviced for it but by no means forced for it. Her life is her own and she should be the one making her decision and not pressured to do so. Also, "getting someone you love away from someone like that has nothing to do with how mature you think they are" - that doesn't sound anything better than Saitou. Only those who are selfish & disregard other's decisions over their own would think like that, hiding behind the facade of "caring" for someone.
I am sorry but I am gonna be honest here. Everyone is voicing their opinion about Inoue & Saitou. So I am also gonna come out & say it. Honestly, I really disliked her friend Tamami & The other guy Hikaru. I mean, if you are really someone's friend & truly like someone then of course you would want the best for her. For that, you might as well give her advice about what is right or wrong. BUT, by no means should you force that person to bend to your decision/opinion or force her to get to like you. Even if you did, then that relationship isn't going to last very long. Because that person won't be truly happy from her heart & you would also feel guilty about it later, no matter what you think ATM. Yes, Saitou is a bad choice for a relationship but Inoue is a big girl. She can decide for herself what is it that she really wants. We all know that what is right/wrong, may be different from what we really want. So, I wish her only precious friend & the guy she also considered to be an important person in her life would have given her a break when she was juggling with herself about Saitou. I felt really sorry for her at that time.