While the trust system is far from perfect, there isn't a significant amount of abuse on any level. Any system gets misused to some extent. As long as the amount of misuse is insignificant, it is acceptable.
....because there are no such thing as merit abuse..
Stuff like this is precisely why almost all threads complaining about the trust system are pure bullshit. Alts of busted people start pitching in in hopes that their accounts will return to non-negative levels.