I would propose that we stop using the term "pirated" for any GPL-licensed theme.

If the issue at hand is maliciously modified GPL themes, then I would propose that we refer to such themes as "malicious" themes or "adulterated" themes, or something - just not "pirated".

Use of the term "pirated" in this context introduces an unwanted and inappropriate value assessment of the distribution of the original themes. And since such distribution is explicitly authorized by the GPL, no value assessment should be made upon such distribution.

In short: there is no such thing as a "pirated" GPL theme, and even if there were, the issue at hand is not the distribution, but rather the malicious adulteration, of such themes.