As a regular on ADVFN you'll no doubt be familiar with all the ramping, deramping, lies and 'rumours' both positive and negative which are frequently posted on this bb for one reason or another. So naturally investors/traders and potential investors/traders are wary of statements made without any reference as to the source of such information.
I know sometimes the source cannot be revealed but it's hardly surprising that people are skeptical when no such information is provided by the poster.