Our noise abatement regulation prohibits the authorization to deviate from an SID if the request is made before take-off, in such a case the aircraft should take a different departure runway. Of course the obvious outcome since the implementation of this rule was that at least the local crews didnīt ask anymore but made the initial call after departure with the request to turn early (or sometimes after having already turned).
Now we have intersecting runways and itīs quite interesting and unsafe having the departure turn early with no warning and going opposite to the inbound traffic for the other runway. Therefore most guys have found ways to avoid adhering to the rule.
The MSA/MRVA is no big problem for us, most departures are above it while still over the runway.