The infamous peer-to-peer network client, similar to Kazaa and running off of the Gnutella network, has been in some recent legal trouble with the RIAA. There have been lawsuits and counter lawsuits debating LimeWire's legality. However, regardless of how legal LimeWire is, it may be dangerous to use. The Denver District Attorney has found that LimeWire has a backdoor-style flaw. LimeWire has an option that lets users search other users, by options as specific as IP addresses, for files they want to download. This means that thieves can gain access to any document they want, including sensitive documents like bank statements, merely because someone left LimeWire open. The Denver District Attorney is currently investigating whether or not LimeWire is to blame for several identity theft cases.

Source: Aversion