I would even find it better that the blocked person would then no longer be able to see my posts as a punishment (if this is the punishment for him). But that should also be one of the options.
Sorry for speaking English here, but this has become probably the biggest issue on my site and I agree that the Blocking function needs to be enhanced and fully agree with this suggestion.
I've lost several members from my site over the last few months because not only did they want to block another member's posts, but they wanted their own posts blocked from the offending members too. When I asked why this was and why the current blocking facility wasn't sufficient for their needs, they replied that they were fed up that the offending members were quoting their posts and using this as a form of attack against them. which they then needed to defend against.
So, block should be a two way process, I agree.
This enhanced feature if it were enabled by WoltLab would be a massive time saving process for forum staff too, as moderation of sites could become largely user-defined, from the bottom-up, rather than top-down from staff.