If you are at an NoS-only checkpoint, you will get groped if your NoS scan shows 'anomalies' (which might just mean the voyeur in the booth was picking his/her nose or having a side conversation and didn't look at your scan), you will get groped if you are 'randomly' selected, you will get groped if you 'opt out' and you will get groped if you are medically unable to assume and hold the position in the NoS (John Mccain can't).

If you answer the questions and WTMD or NoS are available, you are willing and able-bodied to use whichever is assigned to you, you do not alarm and you are not randomly selected, you may not get groped.