This is a terrible, terrible idea.
Showing what is essentially a scammer flag to people with account ages only less than 7 days essentially just opened the door to 10,000's of scammers. There are so many accounts that I've previously tagged that I no longer can, because it doesn't fit into the narrow definitions.
For example, the guy with 20-30 accounts who is permabanned off the site but who keeps creating more... I can't 2. or 3. tag him, and 1. will do next to nothing...
You could say that he is violating a written or implied contract/agreement. If the violation is ongoing, you could move the date up to the present.
Further, if he is banned, you should report him to the administration and additional accounts he creates should be banned.
Since ban evasion is a violation of the terms of service of the site, this clearly falls within violation of contractual agreement.