Maybe one of the forks or backend replacements could implement an option using it to make it compliant. I wouldn't go with the OP's solution since privacy is non-existent on Lemmy, but just blocking interaction seems like it would be enough to make it compliant, and prevent the harassment issues mentioned, I made an issue which addresses this in the Lemmy Github, it proposes a new feature rather than changing the existing blocks because it's good to have mutes and blocks at the same time.