"Scare" as in makes the opposition (coaches) worried these players don't get off the chain.
According to Andy Maher we have the most with 9-10 of these "scary" players:
Bolton
Cotch
Edwards
Houli
Lynch
Martin
Prestia
Riewoldt
Vlastuin
Grimes was a "?".
Left out Lambert & Rioli (hot and cold)
Balta was initially on Maher's list but then he took him off.
Maher claimed Julian De Stoop off air said Courtney Johns was a better player than Noah Balta.
Next best club was Brisbane with eight "scary" players: Andrews, Cameron, Daniher, McCluggage, Neale, Rayner, Rich, Zorko.
Here's the audio: https://player.whooshkaa.com/episode?id=793776