Bad, because there are no demerits.
I don't think we really need a demerit system.
Totally agree. Another point is that demerit system (if implemented in the future) might result in massive abusements in the forum, like trust system. Strict users (mostly higher-ranked) might tend to be hate by lower-ranked, and of course other high-ranked users (who are spammers fortunately ranked up to high ranks mainly due to old ranking system of the forum), and will be under high risk of demerit abusements.