Well the comment is more saying she's doing something risky by putting her phone number and place of work on the flier.

Which I guess I can see that but I think people greatly exaggerate the danger of having a number out there. Like if I put my address online...it's just one of many, many addresses out there. It's only a problem if someone feels the need to target me in particular.

It's also possible that the phone number belongs to a friend or something.