I'd be VERY interested to learn whether the Emirates crew(s) were in any way warned this gent was aboard. Two crews would have been involved, for the NBO-DXB sector and the DXB-CDG sector.
If I was a betting man, I think I'd get pretty good odds on the answer to my question was "no".
On a similar vein, I've always wondered about the 'airline of choice' of the people who went to and from Nairobi to bomb the US Embassy. I'd be very surprised if said airline hasn't already been mentioned on this thread.