Yes but thinking about it a bit more now, it wouldn't be a good solution because anyone could create the same 'a' tag and mess up your results on purpose.

My use case was the same as a few other feeds I have, where I fetch reactions from my follows, then do a single query with 50-100 ids to build feed based on those reactions.

I wanted to do the same for Articles (kind 30023), almost had it ready until I realized I can't query 50-100 article aTags in one go.