I don't think it's a good idea to use email as heavily as OP does for his argument, especially with regards to spam and "weeding out bad actors". > Like the sp

I don't think it's a good idea to use email as heavily as OP does for his argument, especially with regards to spam and "weeding out bad actors". > Like the spam filters developed on top of email, the best Bitcoin services providers will develop the best software to iron out any details the Bitcoin protocol has still left open to abuse. While spam-detection is certainly a lot better than, say, 5 years ago, it's not perfect. And while the cost of false-negatives is relatively low, false-positives can have bad consequences. I don't think average people want to trust their money with something that is as trustworthy as a spam-filter is today, let alone go through the equivalent of "I had 10 penis-enlargement-scams in my inbox this morning"-technology-maturing-phase for a payment technology.