hi, I am not here to blame. just pointing out that the idea has been published before. The utopian category 'suggestion' is not about how the idea can be interpreted or explained better.
Anyone given the idea of Steemit+2FA can write their similar post, which will be counted as duplicate. To be honest, I thought about this days ago, check the comment that I left at my post: https://steemit.com/cn/@justyy/1buna#@ace108/re-justyy-re-ace108-re-justyy-1buna-20171105t124933874z
However, I did a google search and knows this has been published so I didn't write it on utopian.
It doesn't matter whether the original post has detailed explanation or not, since the title is already quite self explanatory.
But, as @arie.steem point out, this is the first post in utopian.