The Roblox ban API has some benefits and flaws, the flaws being that you can join on a alt, even if someone has the "Detect Known Alts". which does nothing as you can go into "%localappdata%\Roblox" delete mostly the number folders, and install "TMAC v6" to change your MAC Address.

There's nothing beneficial that the Ban API has done other than prevent low-class normal players.