So, I just got the "subjective" warning:
The question you're asking appears subjective and is likely to be closed.
when asking about a game system for an EVE Online based campaign.
It appears to me that this is formulated in an unnecessarily harsh way and may scare off new users, especially on a site like RPG.SE that is more open to subjective questions than e.g. SO or SF. Would it be possible to change the message to something like:
The question you're asking appears subjective. Since subjective questions are often difficult or even impossible to answer you should take a look first at the [guidelines for asking subjective questions] and the [FAQ]. You can still ask your question but make sure it fits with the site or it may get closed.
This way the problem was more clearly communicated and the user was directly pointed to the subjective-question-guidelines, making it easier for him to ask a good subjective question from the start instead of having his bad subjective question closed and then pointed to the guidelines.
Note: this question is not about the system of displaying the warning or how it works at all, but rather about how the warning is worded and how it could help the user with additional information to ask a good question instead of scaring him.