It's been bugging me for a while now how werewolf as a tag pretty much violates tag what you see, partly since not everybody seems to agree on what should count as a werewolf on a website where half of the content is about anthropomorphic beasts, and partly because TWYS can often be interpreted in more lenient ways when it comes to species. Most discussions regarding aliases and implications to and from were-* tags tend to have people debating on the exact meaning of those tags in the context of furry art ([1] [2] [3]) and that should probably be a sign that "What counts as a werewolf" is a question that needs a clear answer.
I've personally always been more of the opinion that an image should show traces of a transformation having taken place or make it clear that the character in question is a savage beast and not a "person" anymore. Looking at images like post #1354849, however, I'm on the fence about identification via other physical characteristics (slit pupils, significant size difference, etc.) and that's more of less why I left it at that when I made the wiki edit that added the list of "what should be there for the image to qualify " last week...
deep breath
yes-im-sorry-for-doing-that-without-asking-about-it-on-the-forum-first-and-i-wont-do-it-again-please-dont-hurt-me
Now, if we were to take this as a baseline (please make suggestions on what you think should or shouldn't count), the worgen -> werewolf implication would need to go (and be replaced with a simple -> wolf implication) unless there are other indications within the image that make it match the requirements. I know it's not the first time the implication has been criticized, but werewolf ought to have more meaning than most other species tags, otherwise it would just be redundant with the regular wolf tag.
This is probably going to set a precedent for other were-* tags if we do manage to agree on a definition, so there's that too.
Updated