> Edit: if they can roam freely they are also a threat to many other life forms and bio diversity
They are the most prolific mass murderers of animals in the western world. My vegetarian (cat owning) friend got very upset when I pointed this out.
They are incredibly annoying
But are funny
That's why people keep them
(I got two)
Edit: if they can roam freely they are also a threat to many other life forms and bio diversity