Re your statement And if the policy says BC AD is acceptable that policy should be changed That s something for you to take up with the policy itself then if you truly feel that way But right now the policy is clear that BC AD is both allowed and placed on equal footing with your alternative of BCE CE As long as that remains the policy of Wikipedia in general your complaints are not a valid basis to challenge BC AD s use on a particular article and you have no grounds to force other people to use BCE CE