I'm gonna be honest, the more I look into micro.blog, the less I am enamored of the whole idea. It comes down to part of their "terms of service":
To combat this type of abuse and harassment, Micro.blog has a feature called Safe Replies. Safe Replies attempts to automatically catch potentially harmful replies to you from people you do not follow. We use this to help filter posts out of your timeline that you may not want to see.
Who decides what kind of reply is safe? And what if I decide I'm ok with it?
It sounds no better than Twitter, honestly, where at least I don't have to maintain a Wordpress site or pay someone $5/mo for the privilege of not doing so.