I am sorry that some people here chose to jump all over you for asking a legitimate question.
I'm a newbie myself - read for awhile - ordered my first eGo kit - and joined the forum after the kit was on the way.
These is so much information on this forum - in so many different sections (with so many links to follow here, there, and everywhere), no one could possibly have the time to read all of them unless they read 24/7 for the next 10 years or so. Yes - there's a search function here - which also leads you in 399 different directions.
None of us really know how safe e-cigs are; the parts; the batteries; the portions that we wrap our lips around; the e-juices were sucking in; etc. We are the experimental rats and only time will tell. If there were no side effects, there would be no need for a forum to list and discuss them - right?
Asbestos can be scary. Even scarier when you have a brother (like I do) who has asbestosis (for all the years he worked with it - when it was kept a "deep dark secret" even after the dangers were known); an uncle who died from it; and there's good reason to suspect it may have been the cause of the cancer that killed my father. So would seeing the word "asbestos" send me into a tither? You bet your bippy it would. I think your question was valid and I think your concerns in general are valid because none of us know what the "real deal" is when it comes to e-cigs and the juices. Pretending we do is just as silly as implying that your question was silly.
Do I think it's "probably" safer than cigarettes? Yes. Based on solid evidence? No. I just want it to be - and I'm so old now it doesn't really matter anymore. 
People have had problems with e-cigs. I'm one of those people who are struggling right now. I don't know what the "cause" is and neither does anyone else here. Just "ideas".
This is what makes me wonder why people felt the need to jump down your throat for voicing your concerns and asking a few simple questions. It really makes me sad - because for the most part, people here have been very helpful when I've asked questions - even really stupid ones.
Until someone is able to say with 100% certainty that e-cigs, e-juices, and everything else associated with them has been proven to cause no harmful effects - and can provide the concrete data to back it up - how about we answer questions in a respectful manner? Is that really too much to ask? 
I hope you received the answers you were looking for - from those who replied in a helpful manner -minus the sarcasm and attacks.
Best of luck to you (and ME too!).
I read all posts, and I don't feel anybody was jumping on the OP's throat... Maybe I am missing something here... I do think that there are studies out there, and links were given. Toxicity studies proving that e-gigs are safer than cigarettes. Here is an example:
http://www.healthnz.co.nz/DublinEcigBenchtopHandout.pdf
Want to know what is inside of your e-juice? Here is the lab report for Johnson Creek:
http://cdn.johnsoncreeksmokejuice.com/downloads/JCE_GCMS_Report.pdf. Three ingredients were found: PG, Glyceryn and Nicotine. Compare that with a cigarette....
Here is my honest opinion though: Like with anything, you should have common sense... If I am inhaling something into my lungs, I want to make darn sure I know what is inside. I am not getting something unlabelled from a country God Knows where, sent to me God knows how just to save a buck or two. IMHO, it is not because it is an e-cig, it is safe. In general, yes, MUCH safer - provided you are getting your supplies from a good place.
Hey, I am from Brazil - Water is safe, right? I travel a LOT. Here in the US I drink tap water from any hotel, anywhere in the country..... Ask if I will do that in my own country of origin? Are you kidding me? And that is with WATER!!!
IMHO, same thing applies to e-cigs. As long as you do some research and get your e-juice and supplies from good and reliable vendors, I'd say yes, totally, you are dealing with something much safer than cigarettes.
If you don't do that... well, anyone can put anything inside that bottle and call it e-juice. I am not sure if something can be used instead of PG to dilute it a bit in order to reduce production costs.
I deal with overseas factories for a living, and I a tired of seeing them "forgetting" a screw or two every so often to save a penny. Sorry, but I am not risking my lungs for their penny.
So, in my opinion, and it might not mean anything since I am a brand new vaper, common sense has to apply to e-cigs too
