The Rotten Saga 🍍🍅

Had 2 lovely flatmates who moved in our home earlier this year. They are both well educated couple doing Masters at University. They looked decent and are usually clean and not very messy. Overtime me and the other flatmate found that the pantry and fridge started to smell a bit so had a look at all the items and found that there were rotten pineapple and capsicum lying around along with some stale mouldy pastry. We knew for sure it belonged to the couple so asked them if we could chuck them away but the couple got really upset and mentioned that food in NZ tastes good when it becomes mouldy and it’s even more delicious. We were shocked when they came upstairs and ate the mouldy fruit and enjoyed it much and asked if we wanted to share. On Halloween day they both dressed up as Addam’s family cartoon and brought home a dead rat to take picture with. Now the pantry and vegetables tray in the fridge is starting to get filled up with mould growing everywhere. They also mentioned they like their bathroom with green coating. They took us down to their ensuite room and we were shocked to see mould growing in the bathroom roof and on floor corner. Should we inform the landlord about this?