There won't be much semantic web left in anybody who is posting interesting things are too afraid to talk about them.

Also under your system I could still blackhole the email or just let it go straight to gmails archive.

You may need to contact me, but that doesn't mean I give a rats ass about what you have to say - frequently not being able to be contacted is more valuable than being able to be contacted (for one thing if you can't contact me you can't threaten me with a lawsuit if I don't remove some content that you object to) and anyway my blog accepts comments.