Whenever the evidence begins to pile up against them, they ditch a thread and start anew on another. Do a "poster" search on "crevo_list" and you can find them spouting their inanities on other threads.
Whenever the evidence begins to pile up against them, they ditch a thread and start anew on another Junior's right. FOr a recent example, take a look at the
Russian silver fox thread and see what happens.
It's funny (or not surprising--depending on your humor at the time): the opinion threads and public policy debates seem to rage forever, but the threads headed by articles reporting concrete results tend to fade pretty quickly.