So began a series of critical failures by Metro to protect its passengers. [More]You're how old, and you still think that's their responsibility? And you think exhibiting an utter lack of situational awareness and preparedness puts none of the responsibility on you? The fact that you put the emphasis on "fee[ling] safe" as opposed to being safe pretty much says it all.
Here's the thing about Metro's finest: If you're eating candy bars and french fries, that's one thing--chances are they can ruin your day and still go home at the end of their shift. Otherwise...
And by the way, "stalking" the suspect meant you wouldn't have been able to claim "stand your ground" if he'd turned on you, and you then had to use all necessary force to defend yourself. Not that you could in DC anyway...