Do not interact with them, do not try and reason with them, just block them and encourage others to not engage with them. They are just starting up unnecessary drama and toxicity within the funhouse fandom.
Also adding onto this, they've already been confronted by the developers themselves and they keep trying to push it. At this rate there is no point in trying to argue or reason with them because they have no purpose in the stuff they spat out.
If i ever draw Oc x canon with Dusty or even drawing my interpretation of freddie and his wife will i get dms that want me dead because i am partially a lil terrified