You can block all their content, just delete your account.
If you really hate a company, you won't delete your account. You'll run spam on that (verified human) account or sell it to some third party who wants an account for spamming.
Is there an easy way to delete all of your comments and likes and all of that first? Or at least to randomly alter them into garbage? They make it impossible to do bulk things.
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I deleted all my meta accounts a couple years ago (Facebook, Instagram). When I did it I was afraid I would miss out.
Nope: 5 years after I feel good about not being a dopamine-addicted sheep (At least to Meta). It makes me sick to my stomach whenever I go to a public place and see so many people mindlessly losing their life watching reels and stories full of ads. I Used to take the Caltrain and I estimate >50% of the people were mindlessly scrolling instagram during the 1 hour train ride.
The best time to delete * Meta was yesterday. The next best time is Today.
(To be honest I recreated a bogus account to sell things on MarketPlace and I cannot believe the amount of crap constantly pushed to me)