Depends on the kit.
-Are you just doing a 1" to the front?
-Or are you doing 2"front, 3" rear?
The first option is so minimal I would say it's safe even for moderate off-roading.
The second option I wouldn't even do. Any moderate flexing of the suspension with this installed will cause problems or potential damage such as the rear shocks extending beyond their limit, or the uca's hitting your front coils. Not to mention you probably won't be able to get a good alignment with just this kit alone.
I have a 2.5 front and 1.5 rear kit installed and since this is my daily driver, I don't plan on doing anything off road more than a dirt road with a few bumps and potholes. Alignment is good too.