Despair

It almost certainly is, Both Sanitation and Time2lose use the term “reddit agent” when people point out the automated reposts.

Isn’t that just a client side filter, would be up to whoever runs the community/instance rules for handling bot accounts, and if they feel the accounts should be banned.

Some quick solutions would be:
Use cloudflare’s 1.1.1.3 and 1.0.0.3 DNS. At least this works on the device as long as they don’t change the DNS on the device themselves.
https://developers.cloudflare.com/1.1.1.1/setup/#1111-for-families
Parental control settings on your router.