However, such experts as Sheldon Brown say that it's generally safe to do:
This is probably one of those rare moments when i'll have to disagree with Sheldon. I have seen cranks ruined this way. Look at it this way, campy chorus/record crank exceeds the bb's cost by about a bajillion times
<- slight exaggeration.
I'd do it if i was real short on budget and had an inexpensive crank, but I wouldn't on a nice roadbike.