They may be referring to 'death wobble,' which sometimes occurs after a lift (but usually not from 2" lift). Make sure your tires are properly balanced, and you do a front end alignment afterwards and you should be fine.
2010 JK Wrangler. Born to me on 12/28/09 when El Jeepo (TJ) decided 160K was enough, and threw a rod through a cylinder.
Rubi Rocker Guards; 32" Mastercraft MTs; Teraflex 2.5" Coil Spring Lift; JKS Quick Discos; JKS Front & Rear Adj Trackbars; JKS Ex Rear Swaybar links; Zone Nitro Shocks; 1.5" Rough Country Wheel Spacers; Poison Spyder Evap Skid; Cobra 75WXST; 3' Firestick quick disco; Rugged Ridge XHD Fr Bumper; Tuffy Underseat Drawer; 6" KC Long Range Hilites; Superchips Flashpaq, Crown Extended brake lines
WISH LIST: Front LCAs, Winch, 6" KC Driving Lights, Deep Cycle Battery