Honestly, Wamster, I think you're focusing on the wrong bit. I said it 'shouldn't' be any different with a work colleague or someone I'd just met. Of course it probably would be. I wish it were different.
But, I have to say, I have shared beds with men I've just met. My bed isn't in a nightclub, or a bar (although sometimes I wish it was!). I also don't tend to meet total strangers in my living room. There is quite a stage inbetween meeting someone, inviting them back, having coffee, drinking some more, realising it's really goddam late, and letting them crash. It's always been established that sex is not an option (unless, of course, it was, in which case THAT had usually been established waaaaay before this stage). The bed means sleep, nothing else.
There was even a guy who I met on the internet. He came over, we got drunk, we chatted and didn't realise the time so no train, he stayed. The conversation was had. If he'd been pushy, or exhibited any of the signals we've discussed at length in this thread, then no, he wouldn't have stayed. I would have felt really bad about condemning him to a night at the station or a 50-mile taxi ride but safety first.