Useless tidbit: quite a few out-of-the-box SharePoint feature IDs start with "00bfea71"…

  • Out
  • Of (the)
  • Box
  • F
  • E
  • A
  • 7=T
  • (…ure)
  • 1 (because why the hell not)

PS> @(Get-SPFeature | ?{ $_.Id -match "00bfea71" }).Count

Truth be told, I have actually spent more time than I'm proud to admit trying to figure out how "71" could be an encoded form of "feat", so the GUID could read as "00b(feature)", but it's beyond me.

List of features and their GUIDs on MSDN.