I run a website where there was a forum for people to post about a local railway line used by commuters. <a href="http://www.southminster-branch-line.org.uk/I">http://www.southminster-branch-line.org.uk/I</a> got lots of spam on the forums, so came to the conclusion that since this was a commuter line, there was no real reason for anyone outside the UK to post to it.