There is a simple answer to this question (excellent question, BTW !)
The FEC can only do this if "political advertisement" is first defined.
And that's where you will most likely hit a wall. Let's run through a scenario to see if we can get people on HN to agree what is or is not a political "ad":
- Person tweeting on April 15th, "God, I hate paying taxes."
- Person tweeting on April 15th, "God, I hate paying high taxes."
- Person tweeting on April 15th, "Why are we paying such high taxes?"
- Person tweeting on April 15th, "Why does anyone vote for these high taxes?"
- Person tweeting on April 15th, "Who votes for these high taxes?"
- Person tweeting on April 15th, "We shouldn't have to pay such high taxes!"
- Person tweeting on April 15th, "Why wont anyone reduce our taxes?"
- Person tweeting on April 15th, "Why wont (insert politician) reduce our taxes?"
- Person tweeting on April 15th, "They should vote to reduce these high taxes!"
- Person tweeting on April 15th, "(insert politician) should vote to reduce these high taxes!"
- Person tweeting on April 15th, "Anyone who thinks these taxes are reasonable shouldn't be in office"
- Person tweeting on April 15th, "Anyone who thinks these taxes are reasonable shouldn't be voted out of office"
- Person tweeting on April 15th, "That's it - I'm voting these tax-mongers out of office"
- Person tweeting on April 15th, "That's it - I'm voting (insert politician) out of office"
- Person tweeting on April 15th, "That's it - I'm voting these tax-mongers out of office, and you should too"
- Person tweeting on April 15th, "That's it - I'm voting (insert politician) out of office, and you should too"
- Person tweeting on April 15th, "Vote these tax-mongers out of office"
- Person tweeting on April 15th, "Vote (insert politician) out of office"
- Person tweeting on April 15th, "Stop our excessive taxes!"
- Person tweeting on April 15th, "Stop our excessive taxes, (insert politician) !"
- Person tweeting on April 15th, "Stop our excessive taxes NOW!"
- Person tweeting on April 15th, "I'd vote for anyone who will reduce our taxes!"
- Person tweeting on April 15th, "Vote for anyone who will reduce our taxes!"
- Person tweeting on April 15th, "Vote to reduce our taxes!"
- Person tweeting on April 15th, "I'll vote for anyone who can beat (insert politician) and lower our taxes!"