Looking in the set for what this might do.

• Songs, Cupcake Fountain Expedition, Seal of Failure, Canterlot Banner/Crystal Prep Banner, and any Food, Clue or Treasure tokens: Aren't affected since only a permanent's controller may sacrifice it. (Treasure tokens' abilities are mana abilities as well.) Piecake Eating doesn't work either... anyone can activate the ability, but it won't do anything unless the controller does it.
• Triple Scooper, Snack Psychic: Why would you want to? I guess if you have a Macrobiotic Ooze?
• Compulsive Sprinter, Summer Chic, Potent Pup, Throwing Shade: Why would you want to?
• Scion of the Sun: Sure: if the Scion's controller passes priority with counters on the Scion, anyone with available can fling the counter onto their own choice.
• Traffic Conductor: Sure. Whoever has a Song with a verse counter on it can activate the Controller, with active player getting first dibs.
• Acclaimed Actress: Bahahaha. Yep, that's bonkers.
• Telekinetic Arrester: Yep: anyone with blue mana can tell Twilight to freeze whatever target they can afford to.
• Freshman Flunkies: Haha. Yep. Works. If someone other than the Flunkies' controller has a Demon and black mana, they can flip it if they want.
• Hostile Natives, Professional Welder: Yep, very swayable to shoot their own allies if they don't get tapped to shoot an enemy first.
• Can of Sprinkles, Vending Machine: Yep, they can be pointed at a different target quite happily.
• Decorated Detector: Definitely. Whoever pays the first is the one who gets to scry, and also who gets the Treasure if applicable.

All of which adds up to... it's pretty unlikely to do anything in limited or constructed. It's an OK counter to Telekinetic Arrester, Professional Welder and Can of Sprinkles, but... I fear it doesn't really do much in the set.