Depends on how much meth is smoked, the proximity of smoker and the method the ice is smoked, i.e., pipe vs. aluminum foil. Nasty Assed Stuff!
Just don't be around people smoking meth, and you won't have to worry about it.
To be honest - I can't even believe someone who has been around secondhand meth smoke is still capable of using a computer or able to keep their hands on a computer without one of the meth heads taking it apart or selling it...
hopefully.. I wouldn't want to hire someone who hangs around with people who smoke meth.