Combining susp. and body lifts?

[DirtyBurb86]

I currently have a nice 4" susp. lift on my burb, but like cigarettes, meth, and tattoos, inches seem to be pretty addictive. Long story short - I'd like a few more inches of lift. I've seen some pretty reasonably priced 3" body lifts, but all of the manufacturers have disclaimers warning against combining body lifts with existing susp. lifts. However, at the same time, I see tons of guys cruising around with both. What's the deal??? Any input would be appreciated.

-Shawn