A suburban amusement park outside Sacramento has gotten so many complaints from neighbors about bloodcurdling screams that it has instituted a no-shrieking rule for its new ride, the Scandia Screamer, a windmill-like contraption that sends people plunging 16 stories at nearly 60 miles per hour. “After the first complaint, our rule was no profanity,” said Steve Baddley, general manager at the park, the Scandia Family Fun Center. “Then neighbors said it wasn’t just that — it was the crazy, excessive screaming. Then they said it was really all of it, the loud laughing, everything.” The rule was imposed March 29. As passengers are strapped in, the operator recites a warning that begins: “We are required to remove you from this ride if you make any noise. If you feel you might make a noise, please cover your mouth tightly with your hand.”