The article seems to be focused on the potential risk of interfering with medical devices using the same frequencies for communication. The more obvious danger of a microwave oven is that you must not stick your hand inside a microwave with a defective door sensor while it is running as it will cause heating in the same way that it can boil a cup of water.

I will note, however, that the statement "microwaves are non-ionizing" does not automatically imply the common follow-up that "the absorption of microwaves cannot have any chemical effect other than indirectly through heating". This is evident, for example, in that proteins in the human eye undergo a chemical change in response to absorbing non-ionizing red light. Whether there is such a thing as a non-thermally microwave-driven chemical reaction is an open question in chemistry [1].

I feel the need to clarify as an addendum that nothing in this post suggests any danger associated with the use of low power microwave radiation from consumer wireless communication electronics.

[1] https://en.wikipedia.org/wiki/Non-thermal_microwave_effect

From, well, reading the article, I'd say no.

Non-ionizing radiation is certainly able to have effects on biological systems, and there is no reason to believe that effects are strictly neutral or positive. Calling these facts 'anti-science' is blatantly asinine.

Careful observation and investigation is never "anti-science" by definition.