My leaving the Fairfax/Vienna area would have meant a slow go with "reverse" rush hour traffic on I-66. Hassles of rush hour city traffice. The $12.25 you actually spent (never mind the TardCard™ cost) is probably less than what the cost in time and frustration would be.
Not really -I'd be going the opposite direction, but I hear what you are saying, and obviously I'm not irritated with you for any reason - I actually WANTED to take the train so I could bring my PB along and do some writing to and from.
Put a big sign up at the parking lot - problem solved. I'm al for the TardCard™ and Metro use - I just had a bad experience last night. I'll stop by NC on the way into DC tomorrow and snap a pic of teh parking lot entrance...