[CM30]

Sites assuming that anyone browsing on mobile is just passively browsing, and hiding any of the features that make them easier to navigate on desktop.

For instance, so many wikis remove things like category boxes and navigation bars on mobile, making it a chore to browse different related articles. They also seem to like hiding stuff like 'recent changes' too, as if knowing what changed since your last visit is something only desktop users have the need for.

And god help you if you want to actually contribute to many sites on mobile. That seems to be a complete afterthought for anything without a mobile app (and arguably a lot of those that do have one).