The term "Social Justice Warrior" is often used to dismiss people who argue against discrimination in various arenas. If you want to be taken seriously in discussions about discrimination, then perhaps avoid it.

Putting that aside, I share pjc50's bemusement that arguing for equal pay qualifies as a "hidden agenda". I also don't find speculation the same as "explicitly exposing facts".

Using the term SJW is revealing an ideology, as surely as using M$ in a thread about Microsoft. You might not subscribe to it but most people are going to jump to that conclusion.