What goes into the Wiki is not vetted. In regular intervals, over-eager individuals take it upon themselves to “improve” the Wiki and “clarify” things without consultation, creating misleading or plain wrong information. Even when there is a “vote” on something, it’s usually just 20 or 30 people voting, compared to thousands who might be using a tag. That’s why you need to be very careful. You can certainly ask someone whether they are using tag X for a particular reason now that tag Y is a more common expression of the same concept. But any wording that implies their tagging is “outdated” or even “wrong”, or that they need to change because the Wiki says so, is certain to meet with opposition - especially if you are not a frequent user of the tag in question yourself and lack any subject matter knowledge!