We don't need more duplicate character tags.
Regardless of it being mlp, or not (yeah it is, but that's beside the point), having half a dozen tags for the same character, and adding new ones at a rate anyone would find difficult to keep track of, is just absurd.
Don't believe the "half a dozen" number?
Here:
saddle_rager_(mlp)
fluttershy_(mlp)
flutterbat_(mlp)
fluttershy_(eg)
fluttershy_(idw)
flutterbat_(eg)
Not to mention people keep trying to add crap like "flutterguy" and "nightmare fluttershy" to the mix as well.
Updated