At the same time I put to a voting to ban vote-buying-services. This should be included in our terms and conditions.
How would that be enforced on-chain though without downvotes, just putting the clause in the T&C does not stop vote sellers from running it with their own nodes.
We can block his account if he violates our terms and conditions.
The problem is the blockchain doesn't have terms and conditions, bitcoin doesn't, it doesn't say if you used bitcoin for these reasons then you will be blocked, we need to be careful not to erode freedoms at blockchain level. What you are proposing is making Blurt a permissioned blockchain like a Central Bank Digital Currency (CBDC).
But we can do that on the front end. If you violate the T&C of blurt.blog for instance. But then again with that power someone has to wield it and that makes an opportunity for corruption.
I think the above was being proposed at blockchain level, which is why I had to correct that.