In the Gotham portion of the Spring Event, the heroes can interfere with the mission progression of villains, but villains cannot interfere with the mission progression of heroes. The heroes can kill the plant creatures villains are trying to cultivate, but villains cannot stop heroes from killing the plant creatures, or from taking out the plant-controlled creatures to save the civilians. I've been doing the event missions on both sides, and I don't think it's really fair that only one side can interfere. When playing as a villain, I haven't been griefed too badly by heroes killing my cultivating creatures, but it has happened at least once a day. I wouldn't mind this aspect so much if I could retaliate as a villain, but I can't. This should be looked at. There should either be some way villains can retaliate, or the devs should make it so that when you begin cultivating a creature, the heroes cannot kill it.