Take it temporarily for examination (or copy hard drive) and give back.
Take it a away completely maybe if 'they' find something.

What bothers me (and lots of other visitors and even lot of USA citizens) is that they have the 'right' now to look at private things.

If you have credit card statements, files to do online banking and so on your laptop this is all 'accessible' by the people who look at your pc/mac.

BIG BROTHER is really watching you here....