1. Really depends on how old you are... there should only be long-term effects of muscle fibrosis and some neurological issues that show up in about 20-25 years. For a cyclist, you may prematurely lose the ability to raise your right pinky-toe (proximity to roadbed and inverse-square law) or perhaps show undue skin tanning below the sock-line, which is a potential violation of
Rule #7 (ruling could be challenged, however, non-arm violations lacking precedent). If one is already past a certain age, issues become less impactful and may not limit activities of daily living.
2. It might be unwise to eat this road material, as opposed to regular asphalt. Just like chewing gum, asphalt stays in your stomach for 300 years. Everyone learned that in 2nd grade.
3. This is also a case of "relative risk." When riding, especially in Florida, one must recognize more immediate and likely threats. This includes pythons, alligators, oversized angry bikehater pickmeup trucks and the evasive but ever-present, Florida Man.