Orchid In the world of casual hookups it's not that normal to meet a girl off the street in the early hours and have sex with her at someone's house shortly afterwards.
Sorry but this is nonsense. It's very common for people to hook up in the street. I've seen it happening. Young people pour out of the local bars/clubs in the small hours, hang around at bus stops etc waiting for their transport to arrive, get chatting to others waiting at the same stop and often pair off and go home together, or invite each other to an after party at a mate's house. If you think that's unusual you need to get out more.
Generally people meet in a bar/club/party and go home together. They do have a bit of time to assess the other person. If they don't and end up on the wrong side of the law, who's fault is that?
People who meet in a bar or club frequently start snogging before any conversation has even taken place. You need look no further than posters earlier in this thread for examples. Going home to have sex straight afterwards isn't uncommon either. The taxi ride will usually be used for other things than talking. Are you saying all the millions of young men and women doing this are being negligent?