You are right. But, I think I "like" the idea of a hidden code or pattern because a code can be broken and a pattern can be avoided...sometimes. I doubt terrorism can ever be eradicated (exception being the Day of Judgment that will settle the matter)...but when it becomes "inconvenient" for whoever supplies the money to feed the terrorists...maybe we will only have to spray every 6 months for these type of roaches instead of daily...
That would be nice, but I think we need to fumigate the house first!