I am all for networking.
I believe it is vital to business. I believe in handing them out. (Mine are very cute an hot pink).
But please, do not add me to your mailing list with out my permission. This is especially bothersome when I give you my PERSONAL email.
It’s rude and breaks social rules. I’d like to have a relationship with you that does not involve purchasing your product or service.
It is appropriate to ask if it’s ok to add me to your list or ask me to subscribe to your mailing list (I’ll give you an email I’ve set up for this very purpose).
Please respect me and I’ll respect you when you hand me your card.