I keep them disabled. I lost a sim to the Hysterical one on Winterfest once. I feel like it's way too easy for your sims to get in that state since happy moodlets boost playful ones. My sim was in a good mood because of the holiday and his toddler did something cute which sent him into hysteria and by the time I caught it and tried to calm him down in the bathroom it was too late. The mortified and enraged ones I feel like are harder to get but I just keep them disabled altogether so I don't have to worry about my sims dying just because they watched the comedy channel on tv.
