“I remember the furor over Slaughterhouse, and later over Brinksmanship. I remember the furor over Baltimore Purge. I remember the furor over Meddling of Semsith. The sky may not be falling.” — Emmit Svenson during a heated discussion about the brokenness of Gehenna event cards.
Reference: Gehenna Events causing players to leave ..
I think this quote is true. The reason behind this is not the gehenna events by itself, but the combination of more factors at that time:
1) There was no way to remove events
2) Succubus Club was not banished
3) Kindred Reestructure & Dramatic Upheaval were not banished
With this elements a player could disrupt the table driving a game towards a Nash equilibrium and take profit of it through blackmail.