Sock Puppets are posts from one and the same person but posted under two user names. By registering twice using two different e-mail addresses and two different user names it is possible to create a situation whereby one person can post an inflammatory message and the same person responds to that message using a different user name. In this way controversy is generated and others are drawn into the 'discussion' It looks to me as if we have a couple of 'sock puppets' on this site at present.
but the ISP address gives it away the number in brackets. Unless you have 2 different providers and 2 phone lines .