Here's one potential concern: Multiple pages for the same product (or from the same affiliate company) will leave a huge fingerprint, as your affiliate ID is unique.

1. I could be too paranoid.

2. Use this strategy only with affiliate programs you can't be ID'd by Google and you only use for sailor pages. Don't use any affiliate programs that you've used on pages containing adsense.

3. Promo your own products using fake affiliate numbers.