I add a fair amount of random people off the internet onto my skype, since I don't have to use my realname and sometimes "online gaming buddies" are very useful to be able to talk to on there. But I seriously don't want them to have my real life personal phone number, when I looked in my contacts I see people off skype in there and I assume they also have me in there. Is there a way I can cut this out? It's a big problem for me.