Too many WiFi networks in the same range can indeed cause interference issues. See how well the Wifi works on your smart phone the next time you're at something like a State Fair or large festival. In a campground though I serious doubt you'd have enough networks going to cause a real problem.
JRS & B wrote:
I didn't think many campground's free wifi was all that "secure" in the first place.
If I get my own personal password, then that adds some security.
If everyone in the campground gets the same password when they check in, and they only change it once a month, then that ain't so secure.
Somehow I get the feeling that the campground wants to discourage people from using more than one device at a time so they don't have to add bandwidth - but I am not technically astute enough to know if that even makes sense.
It doesn't matter if everyone has the same wireless password. The purpose of the password is two fold. One to prevent just anyone from stealing bandwidth, the second to encrypt the traffic and prevent snooping of the data packets. Each time you make a connection you get a different encryption key. So unless someone has a sniffer and unlimited resources to crack that encryption you have nothing to worry about. Its the unsecured networks, the "open" WiFi networks that you have to worry about. That traffic is open and unencrypted.