Totally agree... it will only make them targets.
Back in the 60s when I was in uniform there were many people who remembered their National Service and would look kindly on anyone in uniform. Railway ticket collectors allowed uniformed personel to travel in First Class and sleep the journey away, cafes gave extra large portions etc etc. Out of uniform hitchhiking, unless you were pretty, blonde and female, got you very few lifts. Put on the old "Best Blues" and most cars would stop and pick you up.
Not anymore I am afraid. Sorry Bad Idea. I do agree with the home coming parades though and they do seem to be working. Unfortunately it is only a matter of time before some b@st@rd tries to blow one up.