rmdir deletes children through junction

gistfile1.ps1

D:\temp\test> mkdir source
# 
# 
#     Directory: D:\temp\test
# 
# 
# Mode                LastWriteTime     Length Name
# ----                -------------     ------ ----
# d----         9/15/2014   7:42 PM            source
# 
# 
D:\temp\test> cmd /c "mklink /j dest source"
# Junction created for dest <<===>> source

D:\temp\test> echo hi > source\hello.txt

D:\temp\test> type dest\hello.txt
# hi

D:\temp\test> rmdir dest
# 
# Confirm
# The item at D:\temp\test\dest has children and the Recurse parameter was not specified. If you continue, all children will be removed with the item. Are you sure you
# want to continue?
# [Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "Y"): y
# rmdir : D:\temp\test\dest is a NTFS junction point. Use the Force parameter to delete or modify.
# At line:1 char:1
# + rmdir dest
# + ~~~~~~~~~~
#     + CategoryInfo          : WriteError: (D:\temp\test\dest:DirectoryInfo) [Remove-Item], IOException
#     + FullyQualifiedErrorId : DirectoryNotEmpty,Microsoft.PowerShell.Commands.RemoveItemCommand
# 

D:\temp\test> rmdir dest -force
# 
# Confirm
# The item at D:\temp\test\dest has children and the Recurse parameter was not specified. If you continue, all children will be removed with the item. Are you sure you
# want to continue?
# [Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "Y"): y

D:\temp\test> type source\hello.txt
# type : Cannot find path 'D:\temp\test\source\hello.txt' because it does not exist.
#At line:1 char:1
#+ type source\hello.txt
#+ ~~~~~~~~~~~~~~~~~~~~~
#    + CategoryInfo          : ObjectNotFound: (D:\temp\test\source\hello.txt:String) [Get-Content], ItemNotFoundException
#    + FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.GetContentCommand

D:\temp\test> $PSVersionTable
# 
# Name                           Value
# ----                           -----
# PSVersion                      3.0
# WSManStackVersion              3.0
# SerializationVersion           1.1.0.1
# CLRVersion                     4.0.30319.18444
# BuildVersion                   6.2.9200.16481
# PSCompatibleVersions           {1.0, 2.0, 3.0}
# PSRemotingProtocolVersion      2.2