Reasons include excessive spamming (e.g. a spam link), excessive inappropriate projects, studios, comments, or any other type of posts, excessive threats or unfriendly statements), promotional or inappropriate usernames (e.g. BuyItAtExampleStore or TheRealKaj12345) or User Icons, hacking other accounts, impersonating other Scratchers, accounts created to evade blocks or, lastly, repeated addition of inappropriate Profile Page content. This is includes: an inappropriate "About Me" or "What I'm Working On" section; An inappropriate profile thumbnail; Links that lead to otherwise inappropriate content.
If a user was not following the Community Guidelines after repeated warnings, their account will be banned from the website. Sometimes it is more severe, with an entire IP Address or range being banned.