majsparky, Thank you for using the Dell Community Forum. The answer to your question is yes if you do not have your wireless router password protected. If you are broadcasting you a subject to people using your internet.
Please excuse my ignorance on this matter, but I need things explained to me in simple terms. I have a Dell Studio XPS 435T/9000 with a Dell Wireless 1525 WLAN Card.  My printer and cable modem are hard wired to it. Does this mean that exernal devices (laptops, IPODs, etc) can get wireless access to my system and use the internet and printer? Does this make my computer an "Access Point"?  
Wireless 1525 WLAN Card