Why do you need to be so emotional in all of your responses? and why would you background check fellow European citizens who want to come to the UK to study, work or live? If you talk about refugees, the figure is far far below 50.000 in 2015 for the UK. Per capita, thats a very small number.
I agree that the EU bureaucracy is very, if not too extensive at time. However, from a consumers perspective it is often benefitial for us (e.g. cell phone roaming fees were significantly lowered over the last couple of years only because the EU made pressure).
One of the best things about Europe in my eyes is free access: for all EU citizens and companies. If the UK cannot stand eastern European workers (I guess that is the 350k you are referring to?), well then you cannot have access to the biggest single market in the world either. I respect the UK's decision but it's certain that it comes at a very high price. Just today 5 trillion Dollar in stock value were burned. 5.000.000.000.000.000.000 ! That is an insane number.
In a more and more globalized world, which is politically dominated by the US, China and Russia, relatively small countries like let's say the UK, France or Germany do not have such a strong voice as if they stay united - in form of the EU. The time of the British Empire is long over. The UK is not a super power anymore (I am not saying Germany is either) and quitting the EU does not put them in a political or economical pole position. Instead, it will put them in the second row. I doubt that this is in the best interest of the youth and future generations.
As for Lego I think that import customs will have to be beared by the consumers, a falling GBP will lead to higher Lego retail prices, and if the UK actually enters into a recession we could see values on the secondary market go down as more people than usually see a need to sell their Lego collections.