They're not the police, nor is the trust system the judicial system.
*applaud*
If you send Merit to a post that doesn't deserve it, you probably risk your account.
Disagreed. That would be stupid. Either you have the freedom of sending merit to whomever you want, whenever you want, or you have a very restricted system that is somewhat pointless. Users should not be scared to leave merit or the system will collapse.
Someone sending Merit one by one to a single user or a limit number of accounts on different posts will probably raise some red flags to me.