Linkedin doesn't do avatars. They do pictures of you. You are not a cartoon character. > Some examples of photos that shouldn't be used are: > Avatars, emojis, or cartoons The straight ban seems excessively harsh, but fundamentally the pic does seem to be against their policies. https://www.linkedin.com/help/linkedin/answer/a1377087/profi...
They even sent an email after the ban giving me a "friendly heads up" that my profile pictures has been taken down, and advising me to upload a new one. If I had gotten that email a day before I could have done something about it...
The help article says it can be removed, but it doesn't say anything about the account getting altogether blocked with no warning...