I agree, common names tend to cause more problems than they solve. However, in my experience, when introducing people without a science background to new species, I find that scientific names are significantly more intimidating and harder to remember than common names.
As for the common name for Oncometopia alpha, I can’t say that I am aware of that common name having some vulgar meaning. I am not deleting it, so I cannot say for sure, but it is probably being deleted for a different reason. I rarely edit/delete common names, but when I do it is usually because the names appear to have come out of nowhere. In other words, a thorough search finds no evidence of the common name being used. Can you support that this is a common name for this species using sources?