To a person, probably. Encode each letter as a html encoded letter. Won't fool a spider though, and as soon as they go to it it'll show up in the address bar with the proper URI. Why are you trying to do this?
Do you have something specific you wish to hide? Do you, for instance, you want to list email addresses but protect them from being harvested by spammers? There are a few solutions out there for that problem.
Yes. this question should be answered first. If you neither want people nor spiders to follow the links, then who else but you should/could use that link? and if it's only you, then the easiest way would probably be to link to an (intermediate) password-protected page.
By the way I don't think it is a good idea to post this question in three threads at the same time.