Here's an example of how you can get into trouble for something you haven't done.
My friend lives in Toronto and his ISP is Rogers. 2 months ago Rogers cut his service off for violating it's TOS. Basically he was accused of excessive downloading and computer "attacks" on various websites and users. My friend used to do IT and rarely downloads anything. They said his usage was way too high. So he installed some software to monitor the data transferred and had his service restored. He barely used any. They said he was still violating his TOS.
He then got mad and turned off all the PCs on his lan. His usage was still too high. He told them every computer at his home was turned off. They said he was lying. Following some advice from me, he turned off his cable modem. They said he was still downloading stuff. He told them to check his IP and see if his modem was off.
Well, I was correct when I suggested someone spoofed his modem's MAC. Rogers was then able to track down the guilty party. This took nearly a month for my friend to deal with and what did Rogers do about their mistake? Gave him 5 days credit for his troubles.
Just because it looks like you are doing something wrong, doesn't mean you're guilty.