Bandwidth issues stemming from Adware/Viruses or users connecting to your computer to obtain your shared files (legal or illegal).
The potential risk of downloading Adware/Viruses:
Adware/Malware - May potentially take over your computer by changing your home page, adding unwanted items to your web browser, pop-up advertisements, alter your search engine results, or change the search all together. It may also install additional tool bars within your browser and other miscellaneous programs that are extremely difficult to remove. It may track your browsing habits.
Virus – If not adequately protected with a current and up-to-date anti-virus program, a virus can affect the performance of your personal computer, delete files, and render the PC completely useless. It may also infect other users (example: the virus could be sent to all users in your address book). Depending on the type of virus, it may also infect other users of the PenTeleData network.
If you are not the property owner, you are subject to copyright infringement and may be contacted by PenTeleData in care of the RIAA (Recording Industry Association of America) or by another Universal Anti-Piracy agency.