>So he basically loses them before he even can prove that they are his or not?
Yes goods are guilty until proven innocent in court.
>It seems to be a big loophole for the government to just go and steal whatever they want from you, before you've been proven guilty.
It kinda is. Watch the link.
[1] https://www.youtube.com/watch?v=3kEpZWGgJks
>So he basically loses them before he even can prove that they are his or not?
Yes goods are guilty until proven innocent in court.
>It seems to be a big loophole for the government to just go and steal whatever they want from you, before you've been proven guilty.
It kinda is. Watch the link.
[1] https://www.youtube.com/watch?v=3kEpZWGgJks