Tabitca at cryptozoo-oscity writes about the use of the term "monster" in describing the unexplained, mysterious creatures, like Nessie. She makes good points -- we call them "monsters" when they're not. We debate their very existence but even while doing so call them "monsters." As to creations made by humans, Tabitca writes:
cryptozoo-oscity: who are the monsters?: The so called monsters created by scientists recently such as goats crossed with spider DNA and huge ants , are not monsters either. The monsters are those that made them. They did not ask to be made freaks of nature but no one treated them with the respect they deserved , and said do not to tamper with them.
We also make "monsters' out of animals that are minding their own business. The new program on National Geographic's Wicked Tuna comes to mind; there's nothing "wicked" about tuna, it's just a tuna, living its life, until we come along and kill it to eat it. (And I do eat tuna, but I am aware of how it came to be on my plate and I am thankful and respectful of the tuna giving its life so I can eat it.) As far as the tuna is concerned, what is "wicked" are the humans chasing after it and killing it.