If we keep our threads clean it won't be problem, the best solution is to receive a PM for every quote, but Piggy should request the bot to be whitelisted to remove the PM restriction. So there will be more privacy, now everyone can put my thread in the watchlist and see when somebody quotes me, not that I really care about it but...
I'm fairly sure the white listing is not going to happen if i ask for it now, maybe later on if there will be more people signing up. Probably is better to wait when the bot is going to run 24/7.
For the moment to keep the notification less explicit (but not private) the only option is to use telegram.