If people want to post their phone numbers etc that is their choice, but please consider that your personal information then is available to ALL members and in some forums, publicly visible to anyone on the net who decides to view the forum/thread.
Site Rules
[15] All information that you disclose may become public information and caution should be exercised when deciding to share any personal information or discussing another person, website or organisation on the site. This includes providing your address, phone number or other personal information to another member. Please exercise caution. You are legally responsible for all content that you load to the site. The Administrator(s) reserve the right to access any or all content that you transmit using the site or that may be stored within the site and its databases.
Just something to consider