Web Mining: is that bad?

Is web mining such a big problem for the user or is just the ad platforms fear about losing their power?
There has been a lot of noise around Monero and Coinhive lately, or web mining in general, and don’t quite agree with most of what I’m hearing. It all started with The Pirate Bay adding a web mining script to their site, so whenever you’d visit them, your CPU would be used to mine some Monero for them. That was made without any notice to the user, just “stealing” their power.

Is Web Mining Still A Thing? - Crypto Briefing

PDF) Mining E-Commerce Data: The Good, the Bad, and the Ugly

Bitcoin Criminals Set to Spend $1 Billion on Dark Web This Year

Data mining - Wikipedia

Blockchain and Cryptocurrency Plus: The foundations of web 3.0 and

PDF] Intent Mining for the Good , Bad & Ugly Use of Social Web

PDF] Intent Mining for the Good , Bad & Ugly Use of Social Web

Bad journalism is ethically wrong

Social Media & Web Mining for Public Services of Smart Cities