I'm pretty sure tons of people have made web pages or sites without caring about the integrity of the conveyed information. Not every website is something impor

I'm pretty sure tons of people have made web pages or sites without caring about the integrity of the conveyed information. Not every website is something important like banking. It doesn't matter if a nefarious actor tweaks the information on a Shining Force II shrine (and even then, only for people who they're able to MITM). In practice, many pages are also intentionally compromised by their authors (e.g. including malware scripts from Google), and devices are similarly compromised, so end-to-end "integrity" of the page isn't something the device owner even necessarily wants (c.f. privoxy).