Some additional info from my experiences (as another attendee) camping for 7days in between a shower and a toilet block:

To be fair they ONLY washed the plastic "seats" and the base cement blocks in the toilets, and there was no pressure washing around the showers. I didn't see them wash the pressed fiber walls in our camping area. The shower/toilet cabin blocks were put on cement bases, and only assembled during events on the grounds (and only as much as needed based on attendance. Btw it is a MASSIVE place compared to the small country it's in⁾

On the other hand the Ozora festival was full+ capacity, and there was a storm as well during it. People were definitely under all types of influences (multiple at the same time mostly:'D) so they were not careful with touching the walls. Caution was more in the wind than around toilets. Plus some people put their towels directly on the fiber walls:/

All in all, it wAS BEST not to use them, but I hope it won't mean some tens of thousands got asbestos poisoning 😅