Depends on how fast you take the bumps. Here in Mi, not many speed bumps but pot holes do the same damage to your suspension that a speed bump does. All the rock climbing i've done, and i'm sure others have similar opinions, are at controled speeds. If you hit a bump, or in my case, a hole, at 40,50,80mph

yer gonna do some damage and probably going to have to get an allignment. I am not a Wheelin junkie like a lot of these guys, but i'm sure i've done more damage to any of my rigs hittin pot holes than i have wheelin/rock crawlin in N.C., Col, Mi or Moab. Speed is key. just my drunk ass opinion though.
