The above is just my opinion, but I think we're detracting from the main issue in the parent comment, that the term "WuMao" can be considered a derogatory term. Tell me if I'm wrong, but many terms started off neutral, but turned derogatory over time. The example that comes to mind is the N-word that rhymes with aggro, I'm not even sure if it's okay to use that so I'm self-censoring.