Sometimes they insist on being incorrect.

The Guardian refuses to write the degree symbol for temperatures, for example, and have even put this error into their style guide.

https://www.theguardian.com/guardian-style-guide-c

I don't want a degree symbol on my temperatures, but that's because I want them in Kelvin so they shouldn't have one.

300K is too hot and I begin sweating. The Grauniad's House Style is the least of its problems.