It depends where, but I’ve only really seen it said on Lemmy in discussions regarding international relations and my time on Reddit has been significantly reduced.

I have also seen a lot of people on Lemmy who are obvious tankies argue that it is a slur against communist supporters rather than a specific criticism about tribalism, realpolitik, and internal imperialism engaged by communist countries.

It is in the vested interest of tankies to change the meaning of the word.