[Margaret Pilkington]

yes, you are right.
Look at the furore created by immigrants having to wear wristbands in their accommodation so that the staff could identify genuine claimants and feed them.
No-one is shooting at them or bombing them...just making sure they can be identified.
If they don't want these to show when they are out and about then wear long sleeves...it isn't warm enough for T shirts anyway.
At some point this system must have been subject to abuse for this to be adopted.
Many of those in Calais are not refugees, but economic migrants. A refugee would take refuge in the first non hostile country they reached. They would not trek thousands of miles just so that they could come here...and as I have said...Why don't the Rich Saudis take some of their muslim brothers?
Thier culture is similar, the religion is the same.