"".... Every male muslim between the ages of 16 - 60.... ""
How do you determine who is a Muslim - we don't make them wear stars.... Many Muslims have white skin, for example, and are converts. Many Arabs are Christian. Some Muslim women have been suicide bombers. Etc. etc. Profiling, as noted frequently, does seem the way to go - and discreetly I think it's already occurring. The US authorities, for example, are already doing this for many British citizens, especially of Pakistani origin, who can enter the US via the visa waiver scheme. (The visa waiver scheme scares the hell out of the Americans - we should not think it's sacrosanct.)