Let me clarify a bit if I may:
First, wheel spacers are just fine if they are a quality part (Spidertrax) AND they are installed properly and maintained!
Second, why would you use loctite on the spacer stud and not the wheel stud? Deformity, that's why. Let me explain. Your OEM wheel studs are made of a material and they are designed to have a dry torque of around 83 lb ft. If you tighten it much further you will break the stud as many of you have found. I did a write up on that a few years ago here
http://www.toyota-4runner.org/5th-g...retched-lug-stud-issue-solved.html#post937665 if you want to go into the formulas. Suffice to say that on the wheel studs at 83 lb ft the thread will deform a bit and that deformity, along with friction will be enough to keep everything tight. The spacers don't use the same stud material though. They use grade 8 material right? The torque value required to deform those threads a bit is probably higher so to solve that a drop of loctite is required.
It's really no big deal. Follow the directions of the spacer for the spacer bolts and follow the directions for the wheel stud torque. In the end you are accomplishing the same thing with two different methods.