I know that for a fact now. I don't really want to elaborate, but I think I'll have to somewhat to prove my point.
The user and I were talking on IM, and he claimed to be feeding his cavy ice cream, cereal with milk, and hamburgers. He also claimed once that he was feeding his cavy vegetarian fish sticks. I know, it sounds crazy. I took it at face value at first, and discuessed why that was bad for the cavy. He then proceeded to tell me explicitly that his cavy went outside unsupervised, took a picture of his cavy on a very tall platform outside, unprotected, and made several other claims. I soon figured out that it was not true, and asked if he was telling the truth. He said he was, and so I kept it up just in case. It continued to show me that he was fake, and just wanted to get me angry. When I did not respond with anger, but rather with the facts, he soon left me alone. I'm really sorry that this person feels the need to do this.