So...have a question about vaporizers...

Unlike smoking with a bong, pipe, joint or whatever, using a vaporizer shouldn't expose other people to the MJ right?

right. the 2nd hand vapor I have not heard of getting people high. Another bonus is vaping doesn't smell like shit as with smoking does, so you can vape in your room paranoia free in front of the TV!

Like there is no second hand smoke since there is no first hand smoke...or could smoking in a room with someone else also inadvertently give them some as well?...

Well I have noticed it doesn't stink up the house, or fill it up with smoke..but my husband is always in the room with me at night...and I used to smoke out of a bong, and we both prefer me using the vaporizer...