<p>This is IMO totally reasonable. In fact, I've seen other sites organize <a href="https://meta.stackexchange.com/q/103168/150339">tag clean-ups</a> to try to get the community involved in similar behavior.</p>

<p>About the only thing to be concerned with is <a href="https://stats.meta.stackexchange.com/q/837/1036">mass retagging without community approval</a>. Users are just expected to use their best judgement about the boundaries between mass retagging and cleaning up a few questions.</p>
