If provisions like those in the article persist, predictably the predominantly young users of social media will protest loudly, I would think the resulting unrest would be too big a liability for the judges and politicians.
A while back I knew a guy who worked for a US company involved with setting up inventory and telecommunications software for businesses. Having traveled to Brazil to assist with installing the systems, he described the extremely convoluted regulatory environment down there, and how difficult that made it to get anything done.
While the whole affair is hard to understand, the basis for picking on particular targets (e.g., WhatsApp) doesn't make sense. Unless all such services are banned it only punishes the particular providers for no good cause. Speculating out loud about their target selection is unproductive, but possibly someone has more actual info about it.
So I guess like politics anywhere, what they do know well is how to shoot themselves in the foot. Until it's realized what they've done it will cause a lot of trouble for legitimate enterprises, let alone the massive population so negatively affected.
Edit: In the time it took me to write this comment, a bunch of people have add comments about the situation. Wow, that was fast...