I dont business card and never state credentials. If you know me then cool. If not and not interested enough to put number in your phone then your loss.

The piles of business cards that I have thrown in shredders from events and trade shows etc. yikes. forests of the stuff. If you take my number and text me then we actually connected. Its a nice filter.

I don't know of anyone who does this, unless they're like currently a PhD candidate at that university.