Usually I would agree with you but he's not asking for anyone to tell him what to perform and he's not asked for any secrets to be revealed. All he asked is if anyone can suggest tricks that are suitable for a stage act. Given that you know nothing about his knowledge, skill level or speed at which he can learn, I think it's wrong for anyone to make a negative assumption.
By all means stick to that as your opinion, what pissed me off with some of the early replies to this thread is that instead of choosing not to answer, people tried lecturing him on what he should be doing. He didn't even say when the talent show is in his original post, for all any of us know it might not be for a few months.
I know that he doesn't know stage magic, or he wouldn't be asking for tricks. I know he's in school, so he doesn't have that much time. I know stage craft takes far longer to learn than most people realize.
By asking such a vague question he is showing that he thinks that it's the trick that does the magic. It's not. It's the performer. Showmanship makes a magic show, not a trick. That's why the legendary performers we know about were, in fact, legendary. They commanded the stage and entertained powerfully. Learning how to do that takes years.
If he had a character developed, or even a performance style, then the question would have been, "What are some good ways to do X?" not, "What are good tricks?" 'Good' tricks are determined by the one performing them. Penn & Teller do a great sawing-a-lady-in-half. If I had their exact setup, I couldn't do it. It's not my style, it's not my character. Asking such a vague question tells me that he doesn't care what he performs, which means he doesn't have a character.
Also, the fact that he came here without seeming to do ANY research (hence my link to Google), tells me that he's not really put any thought into this at all. That speaks of the attitude of, "I'll just get some tricks and do them and that's that." It tells me he probably won't put any effort into learning how to properly perform a stage illusion, which is only compounded by him saying that he doesn't plan to do any stage work after this. It's a lark to him.
Maybe I'm wrong. But the way he's presented himself is the only thing I have to judge him, and that presentation tells me he's just another hack. And I am tired of seeing hacks on stage making a mockery of something I care about.
So no. I didn't hand him the answer on a silver platter. If he wants to do a stage act, he can put the work into finding material, writing a script, blocking it, rehearsing it and then he can perform it himself. If he can't be bothered to do that, then he does not deserve to go on stage.