The reason WHY they do it is because YOU let them:
Abandon their TOOLS (Facebook, YouTube, Instagram etc. and you force them to eat themselves).
Additionally, think about HOW they do it as SOFTWARE needs HARDWARE! Data/Software may be in transit but will still need a home to settle (Hardware). Technology is a two-way tool it can be used nefariously like they are using it and it can be used for positive.
NEVER FEED THE BEAST!!