*Using* (rather than operating, that's a different story) unsecured wireless networks is not a huge risk at all if you are careful what you do. Like it or not, they are standard in airports, coffee shops, and other public businesses around the world, and if you have a laptop, you'll probably want to take advantage of them.
Anyways, I only mentioned unsecured wireless networks because they are the most extreme example. The nature of the internet is that you have to assume that anyone can see your "conversation" between your computer and the computer you are talking to (in this case RHP). If using a wired network is the equivalent of whispering, an unsecured wireless network is shouting. "Hacking" is nothing more than anyone running a computer program in the vicinity of you and "listening" in on the information you pass between your computer and RHP.
Now, websites should know this. When you do your banking online or use secure email, the webpage you are viewing encrypts everything before you send it across the network. Likewise, they encrypt any information before they send it to you. Anyone listening in on your conversation with your online bank will only see gobbly-gook. You know they are using encryption because in your web browser you will see a little 'lock' symbol or the URL will turn yellow.
Again, they make no assumptions about the network you are using and assume the worst, that people ARE listening in on your conversation. The user should assume the same anytime they use the internet.
As another example, let's take https://www.facebook.com/login.php. Notice the 's' in https, signifying that it's using a secured connection. Facebook only encrypts the password, and after I log in, anyone listening in on my conversation can see what pictures I'm viewing and uploading, what I'm writing on people's walls, etc.; however the main thing is they can't see my password.
That is all I'm asking of RHP here. I don't care if people see what I'm doing on RHP, but it would be nice if they protected my sensitive information like my password by encrypting it.