It drives me nuts for example that discourse has "achievements" to distract you. Every discourse forum I join for customer service is yet another 15 distracting achievements begging for my attention. It's not that I care about the achievements, it's that it's the same notification system that I got a new message so I'm compelled to go see if the highlight is a new message and when it turns out it's not, it's a dumb achievement badge then my time has been wasted and my mind has been distracted.
Multiply this by 50 apps to 100 apps/sites etc and it's clear that features as such that can't be turned off are irresponsible toward and disrespectful of users. That idea that you're a bad person if you design and create such distractions needs to spread.