I have had parts do many, many things that I was really not okay with at all, and I found it was much easier to deal with before I became coconscious with them (because I didn't have much clue about it then!). But I agree with AL - these parts of self have a reason and a purpose and they fulfil some need that exists for the whole system, so just wanting them to stop isn't really going to hold much punch, especially if they still have the ability to act independently of you.
What helped for me was getting to know and understand these parts of self, and eventually gaining empathy and compassion for them. I really had to step out of my own comfort zone for that, and it took a lot of time (years) to be able to tolerate and accept their feelings, needs and wants. All of their 'stuff' was split off from me for a reason (I couldn't tolerate it) so learning to do that was a very long, slow process.
Now that I have a more integrated self I feel 'their' feelings / needs / wants and can weigh that up against all the other feelings / needs / wants that I have to make an informed and integrated decision about how *I* want to act. It took a long time to get there, but with a lot of therapy and internal work it can happen.
Unfortunately this isn't an issue that can be fixed quickly, and what at first may seem to be the quickest way to get there (controlling them so they can't act out) is a fix that can only work for the short term - if it works at all.