Providing the illusion is consistent I wouldn't give a fuck. But if I'm going down the road to the chemists and I see a Dalek driving a cat detector van I'll mebbie do a double take and head for the pub for a consultation. If there's a large voracious aquatic reptile having a long snout with massive jaws and sharp teeth and a body covered with bony plates, (a crocodile) pulling pints; then I know I'm fucked and it's time to write a letter of complaint to the Guardian.
It's amazing 'science' always seems to 'find' whatever it is funded for, and never the oppsite. Drich.