I'd sugest a quick google search for "tragedy of the commons". Then consider how usefull your wirelss video sender will be once you're sucessfully jamming all communications on the 2.4ghz band. Have you checked 900mhz or 5ghz video senders? If that still doesn't work, cables really aren't that hard to hide.

Matthew
PS: Sorry to almost flame. I know what you're dealing with. I don't want to spend the $100 to upgrade my network to 802.11a, but being a college student in an appartment building, it's looking like it's going to be necessary.