Shock! Horror!
Why are you guys even using the "back" button?
Using the "back" button can be an extremely inefficient way of doing your browsing - especially if the page you are going back to is laden with ads and popups.
Open the link you wish to go to in a new browser window, or on a "new tab" if you are using IE7. Then, when you have finished viewing it, just close that window (or tab). The original page will still be somewhere on your screen so you won't have to reload it.
In fact, over a slow connection (such as dialup), you can be reading one topic whilst several others are loading - the key is to open the pages in new windows (or new tabs). On expensive connections (such as via a mobile phone), you really should open all the pages first (via separate browsers, or tabs), then disconnect, then spend the next 30 minutes or so doing the reading.
On IE browsers prior to IE7, right click on the link you wish to go to and choose "Open in new window". On IE7, right click and choose "Open in new tab". Read the page then close it. No need to reload the original page!
Guys, come on!