How to not go below the grid in scene view

I’m a new user to Unity and I was wondering if there was a way to make it so that it won’t let you go below the grid while rotating or strafing in the scene view? I’d also like to know if there was a way to make it so that it does not let you put objects, audio, etc. below the grid. If not, is there any place where i can recommend this feature for a future update?

I haven’t seen a feature like that, but if you want to suggest it, you could do it here:
http://feedback.unity3d.com/