From what I understand, that rule applies to DOX in general, where DOX is not used to attack/troll. In other words, if you were conducing a scam accusation of something of the likes, it should be fine. However, if you've created an account just to troll someone with their personal information it is not [1]. It's quite difficult to draw a line due to the nature in which the rules are presented.
I mean he forgot to leave a callback number so I thought I was helping him out.
If that truly is the case, then why not post it from your real account?
[1] Source:
If you're going around posting people's personal information for no real reason other than just to annoy them, then that's trolling, which is not allowed.