ANSWER:

If such people are from your kinship, you must contact them so that you don’t sever your kinship but you can do that from a distance so that you don’t give them a chance to hurt you. This can be done for few minutes every month or via phone call. 

If they are not related to you, you can keep your distance by avoiding meeting them or mixing with them. 

Now a days some people are harmful to me….how can I get rid of those bad people….