[stephenr]

> I have personally had my phone searched 3 times.

I think it's safe to say the first time got you on a shit list.

So what triggered the first time?

Where were you flying from? Are there any other factors that while not at all indicators of guilt, might make them [suspect] you?

It could have been simple racial profiling or it might be context (ie a lone 60 year old dude travelling from Thailand or the Philippines). Like I said neither of these is a sign of guilt but they may cause/contribute to suspicion.