Yes... but how about personal activities? I mean like fashion magazines interviews or drama interviews etc., these ones are usually followed by fans, not the general public. For example, if they talked about Jonghyun on Music Bank (watched by the general public), it could cause controversy, but maybe it is not the case for individual, low-profile activities.
Furthermore, I feel that Onew's and Key's vibes changed A LOT like there is not that life sparkle in them anymore, like they are on such a low frequency... they changed a lot, and for the worse. Someone showed a twitter post where it was predicted that another SM idol will suicide... sadly, the two could be 'candidates'.
As for Taemin, he got evil. But Minho, he has been so ?constant? ever since debut, all smiles, getting along well with all the other artists, friends with everybody, no scandal or whatever. When he filmed that 'To The Beautiful You' drama, they even talked about a blind date/sogaeting between Minho and actress Kim JiWon (set by the filming director I think) so freely, on that show, Star Golden Bell? But wouldn't this be super controversial for the regular idols? He is also known as a heavy drinker (as Onew, for that matter), but no incident has happened. When Jonghyun hosted Blue Night, he said how Minho called him after getting drunk (that type of call when you are live and the audience can hear what you are discussing about). There were even jokes between fans and some close friends of Minho (TVXQ) that said that he is favoured by LSM, and that he could run SM one day or buy it.
I am just speculating, I hope it doesn't seem that I hate on them or something, I used to listen to them a lot till Jonghyun's suicide happened... it is just that many things seem fishy...