Our neighbor (who used to share another neighbor's wifi access but since the other neighbor moved out) came to my door and asked if I wanted to share internet access. I talked to them and do not think bandwidth will be an issue as they would not (they promised!) download torrents etc.. but only use YouTube! lightly. We agreed a fee and on monday I will give them my password to my network. Before doing so, I figured I would see if I should be aware of any special problems that may arise and whether I could download a (free!) mac Application that could check that they do not access torrents, child porn (you never know!), etc... Is there any software or utilities I can use to ensure that my wifi access is not being abused and should I be aware of any security issues with sharing?