Roblox guests were deleted because people thought they were annoying, but they couldn't even talk! People have been trying forever to bring them back, and others have made things to pay their respects to them, such as YouTube videos, animations, social media posts, etc. If guests were added back in Roblox, there would be less a chance of hacking, as there wouldn't actually be accounts, and the younger kids could play without needing to remember login details. People would also be able to play more peacefully because, as guests can't speak, the chat won't be spammed and abused. Some people will be much happier because many people loved guests.