If the severity is low, Roblox does not ban the users’ accounts, instead, it gives them a warning message. The time period of Roblox bans includes 1 day, 3 days, and 7 days, after which users ...

Roblox system will constantly monitor the activity of an account and if you haven’t signed in to it in one year or 365 days, Roblox will automatically delete it.

You can delete a Roblox account by simply emailing the company, but there are a few other ways to do it.