If you want to use BC and AD, you are free to do so, as are we to use BCE and CE. Everyone who uses the latter, knows the meaning of both notations. Those who use BC and AD and don't know what BCE means, are just ignorant. Using BCE/CE is far from being pointless, as it is often found in academic works and BC and AD are far from being universally acceptable. If it was, then this debate, which started in the fourteenth century, would not have continued all these years.