Paparazzi Trailing the Quaids

Why can't photographers leave Dennis Quaid and his wife alone while they go to the hospital to visit their sick babies?

From TMZ:

More than ten paps (not TMZ) have been on the Quaids, shouting out question after question. We're told Dennis asked them just to leave them alone so they could get to the hospital. When that didn't happen, the Sheriffs escorted the Quaids to Cedars, just after noon today.