The past weekend I took some raw beginners (incl primary school kids) to Boven.
although I was warned, I checked out Fadjas revenge at Hallucinogen Wall, because it is a super low grade (9). Halfway up to get a toprope up, I came across some very loose stuff.

I suggest this route be properly cleaned, and/or avoided by beginners. It is not for beginners due to the risks involved. This route is an accident waiting to happen.

Sooo, uhm...you cleaned it right?

Or do you expect "someone else" to clean it, if so who..and why?

Valid response, Tristan.
Cleaning the route would have taken more than asking the (very inexperienced) schoolkids to stand back while I dropped a loose stone or two. It would not have been a safe operation with the onlookers around. In my opinion it needs proper cleaning.
Maybe it would be a good project in the interest of safety when I visit boven again (without a beginner squad following me). I will pop a post here when its done.

In the meantime, others taking beginners there should be informed.