> the solution would be a negative/positive tag added to kind 7s i think?

That would just put the burden on the publishing client, the sentiment has to be provided by the user in most cases (heart and thumbs up being probably exceptions).

> it was because for whatever reason, alby signer had locked my key and refused to sign it

I've experienced this too, nostr:nprofile1qyvhwumn8ghj7un9d3shjtnddakk7um5wgh8q6twdvhsz9thwden5te0wfjkccte9ejxzmt4wvhxjme0qy88wumn8ghj7mn0wvhxcmmv9uqzq2elcsa8ln3q4cfr0zl3dx2nkw27q4w8jf5qgurw2nds3fydqyx9rhygy4  you aware of this?