KnowThyNeighbor.org is a non-profit grass roots coalition co-founded in September 2005 by Tom Lang and Aaron Toleos for the purpose of publishing a fully searchable list of the names of people who signed the petition to end same sex marriage in Massachusetts that was sponsored by VoteOnMarriage.org.

After its inception in Massachusetts KTN listed on its website the petitions to take away GLBT rights in other states such as Oregon,[1] Arkansas,[2] and Florida, posting the Florida and Arkansas petitions but not the signatures in Oregon where the signature collection effort failed.

According to The Boston Globe in 2006, the campaign has attracted controversy and opponents are reported as saying that "its real purpose is to intimidate".

[5] Similarly, in 2009 in The Seattle Times, Larry Stickney of the group Protect Marriage Washington reportedly accused the homosexual lobby of adopting "hostile, undemocratic, intimidating tactics".

[6] Also in 2009 Associated Press reported via abc40 news that the Arkansas Family Council may ask lawmakers to block the release of this information on the grounds that it violated the rights to privacy of those who signed the petitions.