Possible reasons Romney's campaign bus keeps honking

For the second time this month a Mitt Romney campaign bus has reportedly driven in circles around a group of Obama supporters while honking its horn.

From Talking Points Memo:

Romney's campaign bus circled Obama's fundraiser at Boston Symphony Hall Monday night several times, according to Romney deputy press secretary Ryan Williams and verified by several onlookers who said it was honking its horn as it passed.

The first time this happened was in Ohio before a campaign speech by President Barack Obama.

...

The honking is obnoxious, for sure, but no one has explained what it's really about. So I Googled the phrase "Honk if you..." to see what search suggestions would come up.

Here are six possible reasons Romney's campaign bus is honking, according to Google:

1. "Honk if you love Jesus"

2. "Honk if you love formal logic"

3."Honk if you are wearing a thong"

4. "Honk if you understand punctuated equilibrium"

5. "Honk if you don't exist"

6. "Honk if you love real men"