The moment she sees them, Abby is the human (vampire) embodiment of starry eyes. She bumped into Harley briefly a while back and is still thrilled about that. Her with Poison Ivy is double awesome. Girl power! Hell, yes!

(She ships it.)

Anyway. "...um, I wouldn't want most people to take more than a couple but I already know you're the expert. You can have as many as you can get to follow you, honestly."

What's the worst that can happen? Maybe some of 'em will end up attacking Gotham, but that's not Abby's problem if so! The pumpkins themselves will be fine.