"BUMMER" is an acronym of sorts. It means:
A is for Attention Acquisition leading to Asshole supremacy
B is for Butting into everyone's lives
C is for Cramming content down people's throats
D is for Directing people's behaviors in the sneakiest way possible
E is for Earning money by letting assholes screw everyone else
F is for Fake mobs and Faker society
"Blogger" is the website I use to write these daily posts. It isn't, really, a social media site, and thus is not part of the BUMMER machine. Lanier is pretty clear in differentiating social media from the Internet in general. However, if you happen to be reading this post about Lanier and his admonitions, you may be seeing the post on Facebook or Twitter, and these are definitely sites that Lanier is hoping you will abandon RIGHT NOW. He prints that part of his title in red on the book's dust jacket.
I haven't yet taken Lanier's advice myself, but I do encourage you to read his book. It is short (146 pages), and might at least "vaccinate" you against the worst abuses of the BUMMER machine, even if you don't choose to do what his title tells you to do!
If you do choose to do what Lanier tells you to do, which means that you decide to delete your social media accounts, allow me to point out that you can subscribe to this blog directly, by clicking this link. If you enter your email address in the "Follow by Email" form that can be found right on top of my picture near the upper left-hand corner of my blog, you will receive my blog postings direct, and you won't have to pay any postage to the BUMMER Machine.