Forex and finace related posts

Good day, I am an owner of a community forum and have a question. I've just setup the phpbb3 board software and am now getting some forex topic posted by users. Some words are hyperlinked to what seems like a cheap blogspot, while others ain't. These words don't even make sense. What's even more confusing is that my forum is not even related to forex, it's about pets. Here's how the thread looks like: [quote] auto forex trading have been signaled by [URL= "http://howtradeforex.blogspot.com/2009/06/trade-example.html"] forex accounts[/URL] who gone to my house atforex autopilot to have financialy aided forex currency trading and given money forex forum by the finance authorities of forex hedging who have never gone [url= "http://howtradeforex.blogspot.com/2009/05/currency-traders-trying-to-hang-on-to_13.html"] forex megadroid[/url] about all else forex platforms forever given the forex strategies everyone around who was at forex street were misinformed about forex trading signals that is the best way of [url= "http://howtradeforex.blogspot.com/2009/05/asia-and-south-pacific-january-2007.html"] free forex[/URL] and whoever does it right learn to trade forex will face financial freedom with pro forex [/quote] Why do I get these threads? Is it bad if I remove them?