In my opinion if you have a site that mainly consits of text (e.g. News sites, blogs) you should never interfere with scrolling behaviour. Lazy loading content is ok, but please keep dynamic stuff to a minimum.

Because I'm traveling I'm using a cheap 70$ Android. So the phone isnt very fast and the internet connections slow. This makes a good number of "modern", especally SPA news sites completely unusable. Scrolling callbacks constantly freezing the whole interface. It's not per se the fault of using too much javascript – gmail and facebook work pretty well. But if you dont have ressources to optimize your sites fancy js magic please consider not doing it at all.

I dont expect much of my cheap phone. But reading plain text is definitely something i do.