I'm not actually using this method to disable things like events, I always set AVs that can be saved in an Array.
But I was laying in bed last night, I remember seeing somewhere else a post where person new to Fusion 2.5 said he disables Groups in an event when something is done, like say you run a cutscene and it's over so you just disable the group its in an forget about it.
I thought maybe that's a bad idea, I've only ever put stuff in Groups just as a organization thing, like commenting your code. But who knows, maybe you can save that info in an array or something? I have no idea.