The Somali dating style can only survive in Somalia, it's haram even then, but at least you know your child will end up with a Somali. Disaster struck Somalis, when they brought the same attitude to the diaspora. If you let your child date without your knowledge or you ignore their romantic life altogether, you cannot also be shocked when they bring someone you don't like home. Somalis in the diaspora need to set up Somali match-making services, Somali community centres and so forth. In addition, Islam must be practiced and girls/boys should not be alone without a mahrem present/aware. If this was done, hardly any foreign creep would slip through the net.
Islam tells us this about raising children:
βPlay with them for the first seven years (of their life); then teach them for the next seven years; then advise them for the next seven years (and after that).β The above Hadith of the Prophet gives us the guidance to divide the upbringing of a child into three stages.
Befriend your children, train them to consult you and hopefully they will let you know earlier on if they are into a foreign man/woman. A lot of people do listen to wise counsel, if there is trust and love there. Also, teach your children from young to pray and read adkaar, at least this way they'll have protection from the evil eye and saaxiriin.