[RubyRidgeRandy]

Do you make someone sign a legal document when you give them your number detailing the uses and limitations of how they can share your number? No. You don't.

Once you give your info away it is not "your" info anymore. It is info about you, but you do not own it.

Is it rude? sure, but not illegal.

[mcronce]

Lots of things are amoral but not illegal. I also don't think anybody above you claimed it was illegal.

[RubyRidgeRandy]

"what gives you the right..."

okay.

[Nextgrid]

> Is it rude? sure, but not illegal.

Depends on the jurisdiction. Under the GDPR this might very well be illegal, though obviously enforcement of it is significantly lacking so it's unlikely to ever actually be tested in court.