I doubt the author could claim sufficient originality for it to be covered by copyright. Especially since Facebook pages look like that when loading.

"(The) standard of originality (in copyright law) is low, but it does exist" - U.S. Supreme Court, in Feist vs. Rural Telephone.

This slightly improved version[1] is licensed under the SIL Open Font License.

[1] https://github.com/christiannaths/Redacted-Font