I particularly love how they call co2 lasers Industrial Carbon Dioxide lasers to make them seem scarier than they are. LOL Definitely good marketing, also having his buddy "interview" him like a journalist asking all the right questions and none of the hard questions pretty misleading but also a brilliant marketing tactic.
I'm sure the manual and box will come with all kinds of disclaimers on it. And the fact is 99% of people who buy this won't care that it might vent into the room. A lot of home based and even small office based sadly do some form of this every day throwing a vent pipe out an open door or whatever until they get big enough that they figure they should start taking people's health into consideration. Or someone gets a health problem from it and they are forced to change their practices. I've argued with people that I know personally and also on here for years that you need to vent things properly but rarely do people listen I've found. How many of you are using those crap chinese blowers to vent your machine? Or dryer hose out an open window? My point is a lot of people don't care. So it argue that the hobbiest will care so much about the smell, or health effects is kind of a pointless argument in my opinion. PVS yes that's a a real risk, but most of it won't fit in there, and also something they try to head off by saying you can buy "approved" materials from them. Also brilliant because they now have a re-occurring revenue stream, and they have a way to say hey only use these materials on our list, or you didn't use our approved materials. In a perfect world would they openly list all the dangers? YES. In reality, it isn't going to happen. Even if they did would the average Joe read it? Do you read all the directions for your power tools and the warnings? If you do then you are in the minority, you'd be shocked how many people don't even know how to run a power saw or hammer drill. Never occurs to them to read the directions...