Earlier today I was sitting in the lounge of a major International airport and I connected my computer up to their free Internet service, via a wired connection, which is provided to all visitors of the lounge.
Literally within minutes my computer was being attacked, and fortunately I am running both Anti Virus software and a Firewall, which meant in this case, the attack was blocked. The software I am running also performs continual updates which means as long as I have a connection to the Internet I am updated with whatever updates and definition files are available.
Even so, I decided to remove my computer from their network as it was badly configured and unprotected!
The moral of the story is this, no matter where you are, no matter if you think your computer will be safe, always, always, always make sure that you are protected as best as possible. And always think before connecting to an unknown network, even if you would think that something provided by a reputable airline would be safe.