Avoid baseline creation

Hi!

I have the following problem in RTC:

I am a member of a teamarea, which is owner of a component.
I can create baselines of this component in my repository workspace and can deliver the baseline in a stream.

Every other user can also create a baseline of this component (without delivering the baseline in the stream). Now the baseline is visible in the component and everyone can load this baseline.

How can I avoid, that someone creates baselines of components, although he has  no permission (is NOT a member of the teamarea) to this component?

Manfred