We have all heard how bad smoking around electronics is but seeing it in pictures puts it in perspective. The Register did a followup to their picture series called Vent-blockers recently. They basically take pictures of the insides of PCs that have not seen a good vacuum in ages. This time around one of the pages included pictures of a MacBook that had been used by a smoker.
http://www.theregister.co.uk/2010/11/26/ventblockers_2/page4.html
You can see the rest of the pictures by following links at the bottom of the page.
http://www.theregister.co.uk/2010/11/26/ventblockers_2/page4.html
You can see the rest of the pictures by following links at the bottom of the page.