Well, that's... Not good.
Doxxing shithead politicians and nazis is one thing, harvesting IPs of innocent users is a whole other thing regardless of what your intentions were. I honestly don't know why you thought this was a good idea, but I'm too busy to deal with it so I guess I'll let the other admins decide what to do in this situation.
I'm sorry, Im on phone so I can't take a screenshot :/ but it's simple to describe:
In the settings under moderation, there is a textbox saying "Default application rejection message". Here you just put the msg.
At the applications tab, pressing deny would automatically fill in the reason with the predefined message. I hope this helps, sorry I couldn't screenshot.