I have put 2 & 2 together and could be wrong, but a few things have happened recently to make me think my friend is using my wifi whenever she visits my house.
Ages ago I gave her my wifi password so she could use my internet on her mobile phone, I can't remember what she wanted to do at that time. In February we changed provider, didn't tell my friend, didn't even think about it. Then she got a massive phone bill and asked me if I'd changed my password, she didn't connect the two but when I told her to dispute the bill as I presumed it was a mistake, she made a load of excuses why not and that is when I put the two together. I believe that she has been updating the software on her phone when she visits me and so was being charged by her provider when she thought she was using my wifi for free. I did give her my new password before I got suspicious but now I watch her when she visits and she is on her phone more than my other friends, which I think is rude anyway.
Yesterday I had to leave in a hurry and as I was practically pushing her out the door, she stopped on my doorstep and started fiddling with her phone, when I told her she needed to hurry up as I was in a massive rush she made an excuse about a text message. Surely a text message could have been dealt with after she had left and I was on my way. That really annoyed me, I think she was downloading something and had to stop it before she left.
I might be paranoid and come across as a weirdo but I feel she is using me, she doesn't have Internet at home and I do let her visit me with her laptop occasionally when she needs to use the Internet which I dont mind, I just want to be asked, I don't know what she is downloading and on a basic level it is theft.
I'm thinking of changing my password and not telling her, is that just petty?
WWYD?