I recently got my first laptop and was hesitating getting a router and/or having my ISP come and hook one up. My friend who lives in an apt complex says she picks up someone else's wireless. I found that I can do the same at my house. I think it's great that I can get internet without having to buy a router but if I'm using someone else's signal, does that mean I don't have much security? What could happen to my laptop in using someone else's wireless signal? Thanks