When you are on a wi-fi network, others in your wireless network neighborhood can possibly access your device (and your data) as easily as if you were all hardwired to a common LAN.

Considering how easy it usually is for anyone to listen in on someone else's unencrypted data being transmitted over the air, you may not want to:

1. Remain online any longer than you must,
   
2. Go online using a wireless enabled device that is not guarded by a good Firewall, and an Anti-virus program that is updated with the latest vendor-provided Virii definition files,
   
3. Go online if the Operating System on your PC is not fully patched,
   
4. Have File & Print Service sharing enabled for the "Everyone" user account,
   
5. Have User Accounts with blank/weak passwords,
   
6. Login to computers/websites that do not use SSL for authentication,
   
7. Use applications (such as Chat/Email/FTP/Telnet clients) that send your login details in clear text,
   
8. Configure your wireless adapter to connect to any Access Point available,
   
9. Allow others to hijack your browser session by leaving it open longer than needed, or
   
10. Remain on-air any longer than absolutely needed -considering that many systems encrypt only the initial authentication process, but transmit the remaining data in plain text.

If you were to avoid some of the high-risk practices listed above, there is a good chance that you will be able to keep your system and your data safe from others. However, it is important to note that if someone really wants to get hold of your data being transmitted over your Hotel's wireless LAN, it is quite probable that (s)he would eventually be able to get hold of that -if your system stays on the air long enough. Remember, the only system that could possibly be immune to wireless trespassing would the one that is completely disconnected from a wireless network.