Beg pardon, but don't some of the posters you converse with claim to have near personal interaction with the creatures?
If that were so, and if they were as concerned as you, wouldn't they feel compelled to offer whatever evidence they could? Yet, they don't . Hmm, Can't help wondering their evidence, or their concerns.
Edit: A cold body upon an examining table will prove the point, eh? And those raising doubts and concerns should do their part, too, eh? Yet, they don't, or as I believe, are unable. Thus, the need for the cold, dead body upon a clinical slab. You might exhibit your concern, but realize, if you (or anyone else) chooses not to provide proof, then the need for those bent upon bringing evidence to the forefront.