BlueEyedRook has a humorous post on the Philidor Defense (1. e4 e5 2. Nf3 d6), which I've used from time to time in my own career with some success:
There’s a scene in The Untouchables where Sean Connery, playing a street-wise Chicago cop, and Kevin Costner, playing prohibition crusader, Elliot Ness, are standing outside of one of Al Capone’s many Chicago bootleg liquor factories. All that separates the two federal agents from the prohibited liquor is a small door and, of course, the fury and retribution that Al Capone and his army of thugs will reign down upon them for challenging the mob’s iron grip of Chicago.Sean Connery, reluctant, but ultimately willing to help bring down Capone, wants to make sure Elliot Ness knows what he is about to get into: “lf you walk through this door, you're walking into a world of trouble. There's no turning back. Do you understand?”
That’s how I sum up the Philidor Defense: once you take it up, your stuck with it forever. And that probably is not a good thing.
Be forewarned . . . .
Be advised . . . .
Be so told . . . .
I'm tempted to give it another shot at the next opportunity!