I had a cool little 'news item' show up on my infrequently used Blogger dashboard.
It was a post by +Malte Ubl called Mention people in your posts with Google+
+Malte Ubl +Robert Scoble
The post says:
To mention someone, just type “+” before their name while you’re using the Blogger post editor.
Not sure if this is working for me - or even if I am in the Blogger post editor ...
Seems like a cool feature - but perhaps the beginning of having to block many more people ..?