I rely largely in my common sense - which can be wrong from time to time - but all in all, it has served me well :)
Changed my mind, add the 7/11's to the list.. life w/o coffee? meaningless!... :) I need coffee to function at all. But seriously, what does common sense tells me? ah... I give the terrorist more credit than that. Whatever next hit we get from them, it has to be BIG, as big as they can manage, right? (we know what happens when they give their identity away)... 20, 40 gas stations in fire? Common-sense says, Naaaaahhhh :)
Perhaps you have forgotten the chaos of SINGLE sniper shootings at certain gas stations a few years back - your common sense tells you that life in America would be just hunky dory if TWENTY gas stations were blown up per day? That's 620 per month, assuming just 5 deaths each per average gives you more than the WTC. You need your "common sense" checked.