Been in numerous amounts of trouble with my parents over the years with fish.
When they rebuilt the patio many years ago while i was still in school it 'had' to incorporate a 5,000g Koi pond (1,000g just wasn't enough!)
I got into keeping tropical fish when i'd 'left' home, but because work moved me around alot I smiled at them nicely and they let me keep my small 15g tank at theirs. Then as the tinfoil barbs i had grew the second, much larger tank arrived. They weren't happy. The only space suitable for it was right beside the tv, then mum started complaining again because they'd put on a movie they'd rented and spend the entire film watching my Green Terror pilling stones infront of a plant pot instead.
They also got in trouble from me though. A house move and a couple of tanks later I had 2 Oscars and a Jaguar in one of my tanks. The 2 Oscars both died about the same time so ended up with a tank with just a Jaguar in and had another larger tank with lots of small community fish in. Then I spent 3 years working overseas, and during one phone conversation with my mum she asked if they could get rid of one the tanks by putting the jaguar in with the others. 'Only if you want the others to get eaten' was my reply. She thought i was joking. I'm down to one tank now, a very well fed Jaguar, and moved him out of their house.