Yes I had my laptop searched at Toronto Pearson by the rent a cop customs security team. I had password on my laptop I just put it in, mind you I couldn't be bothered with any hastle as I had been travelling 20 hours and a flight home to the UK to catch. But I remember some 'older' laptops of the more bulkier type they took the batterys and hard drives out to see if there was anything inside. This was just before the Trans-Atlantic bombing attempt.