On Star Trek, the doctors have handheld devices that instantly close any openings in the skin. Imagine that sort of device in the hands of your unscrupulous friends. They would sneak up behind you and seal your ass shut as a practical joke. The devices would be sold in novelty stores instead of medical outlets. All things considered, I'm happy that it's not easy to close other people's orifices.
It would be great to be able to beam your molecules across space and then reassemble them. The only problem is that you have to trust your co-worker to operate the transporter. These are the same people who won't add paper to the photocopier or make a new pot of coffee after taking the last drop. I don't think they'll be double-checking the transporter coordinates. They'll be accidentally beaming people into walls, pets, and furniture. People will spend all their time apologizing for having inanimate objects protruding from parts of their bodies. 'Pay no attention to the knickknacks; I got beamed into a hutch yesterday.'
If I could beam things from one place to another, I'd never leave the house. I'd sit in a big comfy chair and just start beaming groceries, stereo equipment, cheerleaders, and anything else I wanted right into my house. I'm fairly certain I would abuse this power. If anybody came to arrest me, I'd beam them into space. If I wanted some paintings for my walls, I'd beam the contents of the Louvre over to my place, pick out the good stuff, and beam the rest into my neighbor's garage. If I were watching the news on television and didn't like what I heard, I would beam the anchorman into my living room during the commercial break, give him a vicious wedgies, and beam him back before anybody noticed. I'd never worry about 'keeping up with the Jones's, because as soon as they got something nice, it would disappear right out of their hands. My neighbors would have to use milk crates for furniture. And that's only after I had all the milk crates I would ever need for the rest of my life. There's only one thing that could keep me from spending all my time wreaking havoc with the transporter: the holodeck.
For those of you who only watched the 'old' Star Trek, the holodeck can create simulated worlds that look and feel just like the real thing. The characters on Star Trek use the holodeck for recreation during breaks from work. This is somewhat unrealistic. If I had a holodeck, I'd close the door and never come out until I died of exhaustion. It would be hard to convince me I should be anywhere but in the holodeck, getting my oil massage from Cindy Crawford and her simulated twin sister. Holodecks would be very addicting. If there weren't enough holodecks to go around, I'd get the names of all the people who had reservations ahead of me and beam them into concrete walls. I'd feel tense about it, but that's exactly why I'd need a massage. I'm afraid the holodeck will be society's last invention.
According to Star Trek, there are many alien races populated with creatures who would like to have sex with humans. This would open up a lot of anatomical possibilities, but imagine the confusion. It's hard enough to have sex with human beings, much less humanoids. One wrong move and you're suddenly transported naked to the Gamma Quadrant to stand trial for who-knows-what. This could only add to performance anxiety. You would never be quite sure what moves would be sensual and what moves would be a galactic-sized mistake.