Spacers with extended lug bolts

[lolcantturn]

I have 20mm H&R spacers for my IX wheels and 43mm lug bolts which are the appropriate length. VAC motorsports (where I bought the bolts from) said that this is a very unsafe setup and the wheel should inevitably fall off and to just buy the stud kit....
I know it's a bit more convenient to mount wheels with studs, but honestly I've only taken my wheels off once in my ownership of my car (1 year) and wasn't too much of a hassle to put the lugs in with the spacers..
More concerned about safety. Thoughts?

[trippmann]

well the positives are that they are hubcentric and you are using the appropriate lugs, to me this is the same as having a properly offset wheel. on the other hand, you are putting more trust on the lugs having the capability to handle the ungodly power that an e30 puts out.

for a DD i think you would be fine, if you were racing in a top level class i would tell you to reconsider your use of said spacers.