Bard has too many skills to troll with.... be warned riot
This is going to be the go to guy for all trolls in the game. If you had a troll on your team before the most he/she could do was feed the enemy team and not help your team. But this guy.... this guy has 2 skills that can actively help the enemy team.
First that Ult. Oh my god that is going to suck when you get trolled with it. Defending a turret.. not anymore as none of you can move.. Lulz... taking an enemy turret, nope, your team just got full CC'ed and set up for them to attack. Running from a fight.. run no further!! Trying to smite dragon before their jungle does as he is closing in... BOOM dragon zhonyas and you cannot smite. Game defining group fight guess what.. your friendly adc isn't going to be doing much damage because he is now GOLD... bam!
And the tunnel.... although harder to pull off that can also be actively used to your teams detriment. Getting baron, welp, they now have a free trip through the wall to fight you in the pit. Same for dragon. Oh, you want in our base? Tunnels.... Now you can flank us rather than have to worry about that pesky choke point entrance.
I mean I seriously question if riot understands how many 14 year old trolls there are in its game.. It is one thing to have a guy dance in lane all game long. He cannot effect anything other than not participating. This champ tho.. There will be pain. Mark my words.