The idea of the 'poking' is to churn content that didn't receive much attention back to the front page, and there's no technical reason to favorite one tag or date range over another when it comes to that, at least as far as the purpose of the feature.
The point is to have folks look and see why those questions never received much attention, because in many cases it's due to a problem with the question itself. This is really the last net we have before posts just sort of fall between the cracks, so it's the last chance to curate content that's worth keeping.
I see the utility of what you're proposing, but I'm rather reluctant to add any more squelch to this than we already have through users having the ability to ignore certain tags. If we did this, we'd still need to make sure we got eyes on stuff community would stop poking, which means quite a bit of fiddling in
/review again, or possibly adding a new queue.
I'm not sure if the payoff to work ratio is high enough here.