Windows 7 Everyone in C:\Users Security Tab?? Is that right?

[YippieYeah]

Hey guys, I have windows 7 and set up Homegroup. All the folders I share additionally to what Homegroup is sharing have EVERYONE in the Security Tab enabled with all Permissions checked!

Now I also realised that C:\Users has in Security Tab has EVERYONE with Read & Execute - List - Read activated?

Is that the default option?

And is it normal that every folder I share in Homegroup gets EVERYONE added with all Permissions?