I already have FIVE dryers vented inside...
Lint, yes, tons of lint, actually last night Darryl and I were wiping all the washers because they were nasty.
Not only lint, also smog, because we're in Downtown Los Angeles (you can imagine how traffic is) and my giant laundry room has two windows and a door that are open 24/7 (security door is locked when I'm not there).
And no, i have no issues at all with moisture. It's always so windy (my laundry room actually feels like a wind tunnel) that all the moisture is pushed before there's any chance of condensing on the walls.
I'm very aware of the risks of CO poisoning. (four gas dryers and they run at the same time almost every time I do laundry. I have a brand new Kidde CO alarm installed in a very strategic position and the reading is always zero.
And also, I'm in the laundry room usually when I'm washing, but not when drying. It's very rare to stay in the laundry room with a dryer running.
Also, I'm a smoker (heavy). So what's a fart for who already pooped in the pants? I'm pretty sure my Pall Malls are way more dangerous than an eventual trace of lint or CO from the dryers.