Well that's definitely happened before but you really shouldn't believe everything you read. People do either lie, exaggerate or jump to conclusions and end up being wrong.
I'd suggest it's actually the other way. What if the poster read somewhere that a deal had been done and they were only repeating that. They're just as much a victim of the lie as you but now they are banned from the forum. Then next on a deal that has been done, someone says he'll be a £2 player by the end of the day. If that doesn't end up happening should they be banned? Then someone says X player is a good hold but they don't turn out to be, should they be banned?
That's the slippery slope for me and would end with no discussion being allowed on the forum. You shouldn't trust anything people post or anything in the papers without doing your own research.