portmanteau,
With respect, I have to correct your correction of ATCwatcher...
In most cases (internationally speaking) the full FP is not seen by the ATC unit at departure -- unless the FP was filed directly with that unit. If the FP was filed through AIS or a Flight Plan office, then the ATC at the departure aerodrome do not routinely get sent the entire FP. They of course might see it, if they had reason to ask for it.