Just text someone "Hey, so I'm going to get a pistol, and rob the US Bank on <street> in <my city>. Then I think I'll make a trip to Washington to bomb the white house, maybe send a few ricen-laced letters to US Senators on the way. Wanna tag along? Allahu akbar."
Pretty sure that trips a few flags.
I feel sorry for the poor NSA guy having to read through all my texts. Worst. Afternoon. Ever.