What happened to the ads?

Google has removed the ads on my site for "invalid activity" but won't say what I did wrong. This may be similar to the Republican method of honoring the unemployed by not voting to extend unemployment benefits. If you visited an ad previously, thank you for your support, and thanks for continuing to read my blog. I love you, Mommy. Just kidding, Mom. I remember you told me that Internet access is limited to the archangels up there. I know. I know. They never click the ads because they're all socialists. Surely this isn't what Google is complaining about.