If Adelaide's (the Singed support) behavior was bannable, Disco Heat did the exact same thing...
He picked Taric, said he would be a roaming support (same as Singed), didn't start bot (same as Singed), rarely went there (same as Singed), didn't build a sightstone (same as Singed), his teammates didn't approve for the most part (same as Singed), but he gets recognized by League Community as a shining example ( https://www.youtube.com/watch?v=GYbolmDGPEo ), while Adelaide gets suspended and threatened with a ban.
Whether Riot wants to enforce the meta or not, I see no reason one of these people should deserve punishment while the other doesn't. The only thing different about Adelaide's videos is that he picks Singed and takes smite.