I think OP was more referring to "slant" being an offensive term for Asian people. I don't find it (the domain name) offensive, but I'm not Asian (and I've never heard an Asian person called that before).

Personally I think you make things worse if you say that people can't use a term for its non-offensive meaning because it's also used in an unrelated, derogatory way. At that point you're simply promoting using the term for its offensive purpose.