I've noticed there is great controversy over a practice called "Slabbing". I think I'm also correct in my understanding that it means to seal a chip in a clear acrylic shell? Presumably it can't be removed? I haven't seen a scan of one of these. Does anyone have one they can post so I know what a Slab looks like? Also, why is this practice undesirable?

(If someone can point me to a FAQ or something that answers these questions please do so to save the Board readers' time).