Possibly, or it just comes with a disclaimer saying that it will shorten the life of bearings and bushes etc. Not forgetting that they are likely to be higher spec items in the first place.
I'm not sure where I stand with spacers, i think the amount of impact they actually have in real world driving depends on who you talk to. I've always been told to avoid them, but provided you don't go mad - I can't see them really killing your bearing much quicker than normal? It's something I'd definitely have to try for myself to weigh up whether the extra wear and tear was really worth the improvement in handling, if any, by widening the track by 1cm (each side or in total?)