Lets try and be serious here...
I think its 15 year old Iranians who are commandeering rubber motorized boats from Calais and guiding them across the channel to the UK. It really is tragic. They've navigated across some 6 countries to get to the UK where at least they can sit for secondary exams. Yes,some have beards and are 6 foot plus,but it is by having to make such a journey that they put on muscle and beard growth: survival of the fittest.
Let us not prejudge peoples by the way they look. Having a 6 foot young lad with a beard sit in with your 11 year old daughter for maths shouldn't excite any suspicions: our authorities will not complain.
Has anyone any pictures of elderly looking youngsters. I recall one fine looking Syrian youngster who had well defined abs and chisel chin with stubble. I think he said e was 16. The newspapers had him as 30. Outrage!