It's not the first time that I receive chat invitations for job offering or asking help privately. This time, I kindly offered the user to ask a question on SO, to which he replied that he can't because he wants to know "from starting", he's new to the subject and wants to learn.
Personally, I don't think it's proper to use chat to ask for private tutoring (or questions), but I also used to think that adding tags in the title is OK even if not necessary for readability.
So, is it a proper usage? Please enlighten me.