Well, the behavior you talk about comes about from different needs, as you probably know.

Those bright students who are terribly bored can only behave for just so long. If you also have to stop them from participating by their answering all the questions, you do have a time bomb going.

Another student might be bright but not able to figure out what you are teaching due to their learning style, thus they act up to take away the possibility that you will call on them, or to make sure you don't see they aren't doing their work.

Still another may not be receiving any attention at home, and perhaps accidently found out that they can entertain the class and gain much needed attention.

I'm not really for giving the smart bored student more work to do, as that is more like punishment. Perhaps if they complete their work early, or already "know" the subject matter, you can have them assist you with simple tasks about the classroom? (Yes, it's teacher's work but a little bit for good students is wonderful and may create a future teacher.) Are there errands to the office you need done? Papers to be sorted? Etc. If you can explain to the child and the parents the problem and that the special treatment depends upon proper conduct, they will probably be able to contain their boredom at other times.

The student acting out, well, it usually doesn't do much good to sit them down and talk at them. They probably don't realize why they are doing what they are doing. Have they been tested? Do you know their weaknesses in learning? Maybe they do know how they like to learn (fun) and you can come to an agreement that if he/she can work hard at behaving, that you will make sure xx amount of teaching will be the way they have fun/learn. Small group activities and individual time with you or a mentor in class (pair ups) might be another solution.

Try not to take their behavior personally. If they truly don't like you, then maybe they need to be moved to another class.

What you describe is where the real teaching hits the chalkboard imo. Making it tailored for each student so they can learn, and feel special at the same time is what it's all about. Good wishes on your endeavor!