Ascertainment bias arises when data for a study or analysis is collected (or surveyed, screened, or recorded) such that some members of the intended population are less likely to be included than others. The resulting study sample becomes biased, as it is systematically different from the intended population. Ascertainment bias is related to sampling and selection bias.
How can you call it research? You have no way of telling if someone responding is more or less susceptible than someone in the group as a whole, and no way of assessing if those with no axe to grind on this issue are going to respond at all.
What you are going to derive out of this will not have any sort of statistical validity. It may be a number of things, but "research" won't be one of them.