My first worry is the immense danger of these poor folk drowning in this busy shipping thoroughfare. Their 'boats' are usually hardly seaworthy. They must be absolutely terrified.
And children are sometimes among the groups.
Also, they could die of exposure/hypothermia out on the sea at this time of year.
I feel we should be patrolling the Channel in order to save lives, which is more important then 'keeping them out'.

However, in my husband's case, it took two long years of jumping through every possible immigration hoop in order for him to be granted a marriage visa. It cost literally thousands including an Appeal in London. Then Further Leave to Remain and Indefinite Leave To Remain, followed by Citizenship after the Life In The UK test.
I'd feel slightly bitter if just anyone could swan into our country with ease.