Only been to two games.
2006 Preseason: Rams at Chiefs L 12-16
My friend and his dad (both Chief fans) bought my twin brother and I (both Ram fans) tickets to watch the Scott Linehan era begin. As we sat way up in the nose bleed-section alone with no other Ram fans in sight, three older adults probably in their 40's and drunk, picked on us the entire game. Keep in we're 10 years old and with my friend and his dad and they're laughing along with them. I specifically remember the camp kicker (not Wilkins) missed a PAT late in the game and my brother and I became the laughing stock in that particular section.
2009 Week 12: Seahawks at Rams L 17-27
Only memorable highlight is that Steven Jackson punched in a touchdown in garbage time to make the score a bit more respectable. The loss put the Rams at 1-10 and eliminated them from postseason contention.
Personally, if I lived in Pennsylvania (and had the money) I would go to either the Rams/Titans or Rams/Jags match-up. It's never a sure win, but those two seem like the easiest and most winnable road games. Rams/Giants would be closer, but - without seeing them play first - I don't like our odds.