It’s not “extremely” dangerous. I’ve been microwaving food and drinks with cutlery in them for years without incident. In some respects it’s even better than without (more even heating of foods, not having drinks explode in the microwave when too hot). From my experience and online video watching, only metals with sharp-ish edges or micro-ridges pose any kind of danger (e.g. crumpled aluminium, CDs).

Duh, the crooked ones need special clothing.