I think it’s probably the case that people who look easy going might get targeted. I find the easiest way to get the explosives test is to look at the screener and smile. I’m basically saying, “g’day mate, I know your job is **** and you’re bored, wave your tester over my bag and clothes if you want, it’s all cool.” If I particularly want to avoid screening I just stare straight ahead and walk assertively past as though I have things to do and places to be. It doesn’t always work but I think it sways your chances one way or the other. This is all out of uniform.
One thing that has amused me lately while in uniform is having the screener test the entire crew with one swab. It might be more efficient and get us all through more quickly, but if it comes up positive you’re stuck with all of us and the company possibly has to replace the entire crew while it’s sorted out.