Obviously, you believe that doing the above in wrong, because it’s wrong to put ourselves into such a situation altogether.
Why is this more of a question on me than on you, since you also agree that a filter is important?
As far as I know, the brochure wasn’t written by a Rishon, and it’s pointless to try to make diyukim to “farenfer a shvere shtikel asifa kuntres” (although I could), but that statement is certainly true when one happens to find himself in such a predicament.