The gist of the idea is that I want to be able to block a person FOREVER if I wish; or TEMPORARY if I wish. I want the choice. If you wish 30 days, you can use that, if I wish permanent I can use that. The choice will not harm your wishes and more people will be happy as both possibilities can be used.
I don't want to repeat the blocking every 30 days. Especially not if I have dozens of people blocked. There are too many posters that, to me, have no value at all and they just create garbage postings for me.
If you still have a lot to learn I understand that you just need a 30 days block. That explains also your + 15,000 postings in just 4 years. 15,000 postings that I don't need to see.