Would it be possible for people to become wifi hotspots?

The implant industry is booming. Hundreds of millions of dollars are bring invested in implants. Chips are implanted in animals all the time yo track them, keep inventory and monitor bodily functions.

So what if a chip could be made that is implanted into a humans leg or on any other large muscle that creates a wifi signal? It would gain power from the kinetic energy from walking, or from body heat.

I could imagine problems with pacemakers. But also, what if someone hacks your wifi an makes the chip do harmful things?

I don’t think this is too farfetched. What do you guys think?