Man, some people are a bit full of themselves. Since when is it so horrid to support a site by clicking ads that they put up there so that they can continue to let you use it for free? Your "expertise" isn't supporting the forum other than allowing someone who needs help to come here and try to get it, which means THEY need to click the ads otherwise all it's doing is using bandwidth. So the end result is by refusing to click ads, you pass the responsibility to someone else while being able to pat yourself on the back for helping people.
Everyone agrees the ads are bad on the left and need to be changed in some way. I think wrapping the content below the ads will ruin the layout even more, since the posts won't line up anymore, making it look even more unprofessional. I'll point out again that nobody complains that the main AT site's ads on BOTH sides of the screen result in only half of the page being real content, and that the ads result in gigantic empty spaces.
There seem to be an awful lot of people who are anti-advertisements even moreso than they're against the ads being on the left. If you can't stand ads, block them and don't complain about the forums being slow due to having to limit bandwidth usage, or subscribe, or try to find another forum with no ads. Nobody LIKES ads, but they are a necessity. Nobody guarantees that you'll be provided an ad-free, no-cost forum when you sign up for Internet service. Don't try to use the ads on the left as a way to hide the fact that you just don't want to look at ads at all.
There's nothing WRONG with the threads being a little more narrow, you're just not used to it, and you're used to getting full-width content without ads getting in the way, for free, and that's over, get used to it.