wireless internet

[Bill Bixby]

Getting my cable modem set up monday. However, ive notice that im getting on the internet via my neighbor for free. How safe is it to play poker over the weekend? I have anti viruses and zone alarm. Is it easy for someone to hack into my computer when im feeding off my neighbors internet? If so I will just wait until they come install the cable modem for me on Monday, thnaks in advance!!