[p_l]

The project got hit for providing an ISO with license check removed, not for customizing windows. Over the last ~25 years I don't recall any of the windows customization tools getting hit with DMCA... because they didn't provide a technically illegal copy of the OS with them.

[thomaslord]

This is incorrect - the license check is not removed. (It's still a violation of copyright laws because they're publishing a derivative work without permission.)