I would think if there was any danger of the fuses damaging the equipment neither Steve Deckert of Decware nor Paul McGowan of PS Audio would recommend them in their products.
This reminded me of a conversation I had with the folks over at Ayre several years ago about some of their equipment I owned. As a major manufacturer of audio equipment in the USA, Ayre is well-known for both their consistent design philosophies and for the importance they place on listening tests in the final "voicing" of their broad range of products.
We were discussing "audiophile" fuses and I was told their internal discussions had yet to define how they might respond to the warranty coverage of their gear, if damage was determined to have occurred because the equipment was not adequately protected by such fuses. At that time, I remember discussing that the concern was related to the lack of testing and potential consistency issues with the aftermarket fuses, compared to the tried and true Bussmann and Little type fuses.
To be clear, I have no idea of Ayre's current viewpoint on aftermarket or audiophile fuses. Based on the quality of their equipment, I doubt a small variance in fuse value would put their equipment at risk and, based on the quality of their reputation, I suspect they may very well cover damage to their still-under-warranty equipment, even if an aftermarket audiophile fuse was used, with the exception of gross negligence. The point of this post is that, even a few short years ago, a top manufacturer not only did not embrace the use of audiophile fuses in their gear, but showed some concern for the suitability of such fuses to do the job intended.
OTOH, and in fairness of an opposing viewpoint, I have done several projects with Steve McCormack, another well-respected designer of excellent sounding electronic equipment, and he embraces the differences/improvements he hears from audiophile fuses and includes them in his products. In my experience, he does not recommend just one type/manufacturer, but instead has determined that different fuses can work best in different locations within the equipment (i.e., line fuses vs. rail fuses), so he uses the fuse he believes sound best for the specific application.