No picture taking on any ride has always been a standard park policy at Cedar Point, this should be nothing new. Ride Ops don't always have the time or inclination to include it in their spiels, but you will hear it on occasion. There could have been some incident with an angry guest breaking a camera and trying to get CP to take the blame, but it's a common policy.
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PO!NT OF VIEW - A Different Look at Roller Coasters
http://www.crosswinds.net/~justmayntz/thrills/