I reckon a way of getting through this, if you are up to no good (well, I say no good, I mean no good in their terms, so like Snowden), is to look a bit like a perv, and have a few iffy pics and vids on the laptop. Maybe a bit of perv browsing history and what not. That way, you look shify, they pull you in, search, find the pics, reaslise why you look shifty, also realise the pics are actually legal, and send you on your way. Humans being human are likely to stop searching as soon as they find the smut, and miss what you might be really hiding.