The NewScientist asks if in-flight Wi-Fi or cell use might be banned after Yemeni-originated bombs: Wi-Fi seems unlikely to be disabled for security reasons. A compatriot would be required on board to navigate the login process with an account or credit card, or a script would have to be written to handle that. It seems rather complicated and prone to failure. Otherwise, a compatriot would need to be on board, in which case the compatriot could trigger the event.
There's one potential for danger, which is DNS tunneling. Devicescape and other authentication systems work at hotspots by sending particular DNS queries through to remote servers that respond with information in special text records that can provide login credentials and other information. DNS is proxied and often scrubbed for hotspots, however, and I suspect that Aircell figured this out in advance.
On the cell side, only a handful of planes in Europe and the Middle East are flying with picocells on board that can be used to establish a phone connection via a satellite data link. A number of elements would also need to be in place for a remote connection to be established. A timer or air-to-ground cell link would be much more reliable.
I expect that authorities will scrutinize in-flight cell and Wi-Fi service for additional weaknesses, but I doubt any ban will be put in place.