Hi Lucile,
We´re not picking on you, it´s just that these forums point out to anyone that´s reading them what is happening and, therefore, we´re just stating our opinion for others that see the posts. I think I see now what you are saying - you are getting a signon from his network through no fault of your own?
So, it´s good that you have your own connection but that doesn´t make it right to sign on to a network that´s not yours. It´s kind of like taking his newspaper in the morning, reading it, and then returning it before he wakes up, even though you take a different newspaper of your own. If he knew that you were doing it, there would be no problem...
I don´t think Christian meant his comments as an accusation, just as a statement of fact. The fact that you didn´t know you were doing something less than honest is a mitigating factor. One might argue that it´s his fault for having a network that advertises to anyone out there that it´s available and then signs you on without any intervention from you, if that´s what is happening.
I see two ways of handling this. 1) Tell the neighbor what is going on and ask him what he wants you to do - maybe he will have no problem with it and say use it. 2) Turn off your wireless access when you are at home, you don´t need it as you have your own connection.
In any case, this person needs to set up some security on his wireless network before someone malicious gets in there and start messing around with his system. He´s actually lucky you are there to straighten him out...