well it really depends on what you want to attach and how much stress it's going to place on the wall. In the case of the rack you post, I would recommend a backer board on the other side of the wall. Nothing that will get in the way of the drawers but something to increase the overall thickness (and quality) of the wall. You might also consider molly bolts but again having some quality to the wall thickness is a better solution.
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2013 23B
2001 Tahoe
Sold 2005 Fleetwood Allegiance
Sold 1999 Durango
When I mounted a TV hangar from under the stereo area, I had to add some supports to the framework inside where the stereo is mounted. Nothing too big but enough to support the frame and TV.