It's a standard problem of TV drama that no-one manages secrets properly. In B5, people were forever discussing items of vital security in corridors, and Sheridan's office appeared to have no door whatsoever. Smallville takes the prize, however. For years, I've been wound up by Clark and everyone else bursting in on Lex in his office, apparently surprising him and forcing him to close his laptop. This is a guy who employs professional security in his mansion. But recently, it's gotten worse: Chloe and Clark have been discussing Clark's super-powers, surrounded by people, while standing in the press room of the Daily Planet newspaper. From which Clark will then disappear, at super-speed.