The better advice is to know the laws of the country you're in. For example in Germany you can simply refuse to give them your password and they can't use that

The better advice is to know the laws of the country you're in. For example in Germany you can simply refuse to give them your password and they can't use that against you in any way. No need for a reason or plausible deniability. The same strategy wouldn't work in the UK. Here is an overview: https://en.wikipedia.org/wiki/Key_disclosure_law https://en.wikipedia.org/wiki/Key_disclosure_law