5. Misusing someone else's contacts for yourself: Many times especially in the social networking sites it is seen that people try to misuse someone else’s contacts for themselves, they do this in order to get connected with people working in their own field of work, but this in return can annoy the person whose contacts you are trying to use for yourself, says Alison. Keep in mind that he/she is the person who should be given more importance and he/she should not feel that you have added him/her in your friend list just to get linked with other people related to your field of work.