Dark Gothic rules uncertainty

[mqstout]

The partner and myself played a few games of DG last night. One bit of rules came up. (More review coming later when we play a few more.)

Do I have to use the Ghosts ability every turn, even if I don't want to, with the risk there for the villain? For the game, he and I agreed that I did have to. Any dissenting opinions?

Quote:Greystone Gargoyle (Level 2 villain)
Global: Anytime a hero rolls an (OMEN) on the omen die, the must acquire a Dark Secret.

Quote:Ghosts in the Fog card, in play already
Once per turn, roll the omen die. On the roll of (OMEN) gain 1 spirit.
Remains in play.

The Remains in Play part of the rules doesn't seem to address this either.

Sadly, I don't expect any official responses (even on the infernal BGG). The Frog seems to have dropped DG before they even had it on the market, especially with the low-fat-Swiss-cheesed rule book. I certainly say I like it already, and my boyfriend certainly does even moreso.