Hi
whoever using Facebook in mobile/iPad or other smart devices need be careful about saving WG number in their device ,
Facebook recently asking your telephone number for having new or exciting account , by adding number you will automatically link to those people they have your number saved in their device and they will see you Facebook/profile picture as a suggestion friend ,
I am sure everyone has different number for punting but if you don't make sure don't use is for Facebook ,
This is not about only WG , this will happen for those people you don't want they see your Facebook and you have their number in your mobile