I complied with everything they ask and they no longer bug me really. But still Google+ is unusable, it constantly uses 40% of my processor just to have that tab open in Chrome/Linux. Facebook runs lovely in comparison.
The size of the DOM is one of many complaints I've had with the service. It effectively made me choose between one of two browsers, and limits the number of tabs I can open on the site (for resource exhaustion), though opening new tabs to go to the proper context is the only way to accomplish many tasks.