Email may have been a good choice of communication method based on how the initiator thought the conversation was going to go.

FORBES: Better Communication: Technology Isn't Always The Best Solution

Whereas it takes a lot to get unfriended on Facebook, on Twitter, people follow and unfollow at the same pace that they go in and out of conversation at a cocktail party.

FORBES: It's Not Who You Know, It's Who You Follow: Twitter in 4 Steps