Above all, apply tags with intention!
Tags are meant to inform users so they can make the correct decisions on what they wish to see, and what they don't, via blacklists or just surface-level visual inspection.
Moreover, when a new release happens, any subscribers to that tag get sent a notification 5 minutes after it gets posted. For that reason it's important to be as accurate as possible from the outset where possible.
Cas doesn't like them and is going to ramble a bit about it soonTM here. Future site overhauls would also fully incorporate this policy anyway so may as well do this sooner than later.