I don't know whether I am reporting this correct or not but these members have used external links in the thread. As far as I remember external links are not allowed in this site. Please correct me if I am wrong. Here is the post: How to Use Two WhatsApp Accounts on One Android Device
Thank you Vikas for reporting about this issue. I checked the link provided by you, it isn't there anymore. But yes, even I have found few new members using external links in many of their posts. If you find any such mistakes anywhere do bring them to the notice of webmasters.