Board Thread:Roblox help and discussion/@comment-38146086-20190327000358/@comment-37748506-20190328022952

Well, Roblox mainly censors/blacklists so many words for their system because it's supposed to be a kid-friendly platform in the first place, so what people say to others has to be appropriate. It's just like in school; there are rules, and if you break a rule, you would get expelled or suspended; in this case, for Roblox, banned. Let ROBLOX (yes, the staff, not the game, why I capitalized..) do what they need to to keep it a safe platform.

But, a good explaination for them censoring/blacklisting numbers is because they want to make sure no kids give out their phone numbers. That's the main reason why.