It was discussed that the best option would be to grey out a memo once the community flagged an author or link as malicious.
It's up to the Hive frontends to implement this, though.
ie. 
The community uses my bot (this) to mark authors and links as phishing (see info about my !phishing command at the bottom of this recent post of mine about this same topic as this post) and the flagged users/domains are available to everyone HERE.
Note: top-40 witnesses can blacklist users/links OR in alternative 3 above-50 users reporting the same user/link. Auto-upvotes are in place to incentivize reports and whitelists are used for reputable users/domains.
RE: PSA! Be very careful clicking on links from non-reputable Hive users