Good post, Deborah, and a good example of the tale of two contrasting yoga instructors. 

One thought occurred to me: Are spammers really "mass marketers?" I'm thinking I'll refer to them merely as spammers from now on so I don't lump them in with people doing more honest mass marketing (e.g. a television advertisement on a network program that appeals to many demographic groups). 

Keep up the great work!
Brad