[Tepix]

I hate when they do that. Here is a bookmarklet that will fix those pages:

    javascript:document.querySelector('meta[name=viewport]').setAttribute('content','width=device-width,initial-scale=1.0,maximum-scale=10.0,user-scalable=1');

The real fix is of course to complain to the page author.

[aorth]

Reader mode on Firefox does a great job too!

[sli]

Reader mode in Safari on iOS works great as well, but the zoom level doesn't seem to be fixed, either. It's initially zoomed in but I'm able to zoom out and it will stay.