Poisoned there's no point, if they were going to kill us via poison, why not just do it where we were instead of going through the hassle of abduction?

As for drugging...
[He thinks about it for a second which implies he hadn't considered that option??? Hello??]

Well, with the hugely varied demographic here that'd be dangerous. If they dosed it for the lower end, the people with higher resistance wouldn't be effective, and if they dosed it for the higher end, they risk killing the people with less resistance, which I'll refer back to my first point.