Is it normal to poop on the carpet and blame it on my roommate's dog?

Ok so i live with 3 other roommates in a pretty small apartment. I am highly allergic to cats and dogs. Like if i'm in a house with cats my face swells up, i sneeze, get runny nose,i get hives, get itchy, and on occasion my throat closes up. With dogs it is not as bad but i still sneeze, feel congested, and get really itchy. It makes me feel horrible. So recently one of my roommates asked us all if it would be Ok if he got a dog. I told him about my allergies, (which he already knew about)and politely said no it would be a horrible situation for me. I left for a weekend to visit home and when i returned i find out he adopted a 2 year old coon hound. The dog non stop whines, destroyed our coach, chewed the T.V. outlet cord, scratched our coffee table up and has ruined so many other things. It is really annoying and worst of all it is really bothering my allergies. My other roommates said they told him i said no but he didn't care. The dog is house trained but it has drove me to the point of insanity. I started taking bowel movements on the floor of the apartment and blamed it on the dog. I know its childish but my roommate completely disrespected me and my needs. The first time i was thrilled watching him clean my poop up. After the first time i got more inventive. I pooped on his floor, on his shoes, peed on his clothes, my latest was when i had diarrhea i did it all over his bed. The only part i feel bad about it watching the dog get yelled at although my roommate never beats or actually hits the dog. He just yells and puts it in the cage for 15 minutes. Am i wrong?