DDP - Missing your ADP?

[jojo14]

Here comes a silly question - what happens if you miss an ADR? Do you get charged a penalty (for restaurants other than Hoop etc.), or does it affect your other reservations (i.e. do you get blacklisted)?? I'm worried we'll get caught up in an activity and miss a res... Unlikely really, since I'm so excited about our dinner plans, but stranger things have happened.

Thanks for your help!