I had double A batteries in the box (lined up in a row) in my suitcase. Apparently they looked like bullets, so I had to open it up and let them see it was just batteries.
Coming back from LA my brothers case had tape wrapped around it, which meant that they had opened it up and searched it for some reason lol he wasn't happy.
Yes I had this happen to me too recently. On a return trip I always put all my dirty undies on top. Seriously. Hopefully that makes any 'inspection' of my luggage really quick, LMAO!!
I was watching on the news the other day taht some of these security people @ the airports do not do their job right. Their supervisors tested them and put items in suitcases that looked like bombs, knives, and drugs, and when putting it thru the xray maching 9 times out of 10 it went thru and they didn't say anything..... makes you think....