Why are celebrity cell phone numbers not made public?

IMedia Connection states that celebrities whose cell phone numbers are made known to the public are often subjected to harassment and even danger. Celebrities seek privacy in order to avoid negative commentary on a personal level from people they do not know.

Some of the methods used by celebrities to keep their contact information out of public view include keeping unlisted phone numbers, being very selective with their contacts and changing their phone numbers frequently. During private events like weddings, celebrities may ask guests and staff to sign non-disclosure agreements or check in personal items like phones and laptops to ensure privacy.