And what about trade-secrets that I may have on my machine - for example not-yet released source code, material under NDA (or other strict licensing) - are they supposed to look at that too?
Reading the original article in The Mirror's web-site [the UK's Most Reliable News Source - Not!], it seems like they are looking for photographs [of what?] amongst other things - so if I have my 6500 JPG files that I have taken with my 24MP Canon EOS 1DsMk3 [no, I personally haven't got one of those] on my machine, taking up some considerable space - how do they deal with that?
But reading between the lines, it seems like "It's legal for customs officers to search your laptop", but I don't equal that with "they will ALWAYS SEARCH EVERYONES laptop" - I believe that is typical Tabloid scare "don't tell all the details, let the reader add the missing parts and make it bigger".