Constructive comment, you probably already knew this but please look for
RED items below.
From Microsoft
https://support.microsoft.com/en-us/kb/905231
Site names, subsite names, or site group names
You cannot use the following characters anywhere in a site name, in a subsite name, or in a site or Active Directory group name:
Tilde (~)
Number sign (#)
Percent (%)
Ampersand (&)
Asterisk (*)
Braces ({ })
Backslash (\)
Colon (:)
Angle brackets (< >)
Question mark (?)
Slash (/)
Plus sign (+)
Pipe (|)
Quotation mark (")
You cannot start a site name, a subsite name, or a site group name with an underscore (_) character or with the period (.) character.
When you create a site name, a subsite name, or a site group name, you cannot use strings that were already used to name managed paths.
You cannot use the period character consecutively in the middle of a site name, a subsite name, or a site group name.
You cannot use the period character at the end of a site name, a subsite name, or a site group name.
Folder names
You cannot use the following characters anywhere in a folder name or a server name:
Tilde
Number sign
Percent
Ampersand
Asterisk
Braces
Backslash
Colon
Angle brackets
Question mark
Slash
Pipe
Quotation mark
You cannot use the period character consecutively in the middle of a folder name.
You cannot use the period character at the end of a folder name.
You cannot start a folder name with a period character.
If you use an underscore character (_) at the beginning of a folder name, the folder will be a hidden folder.
Additionally, a folder that contains the string "_vti_" is reserved by SharePoint, and isn’t supported.
File names
You cannot use the following characters anywhere in a file name:
Tilde
Number sign
Percent
Ampersand
Asterisk
Braces
Backslash
Colon
Angle brackets
Question mark
Slash
Pipe
Quotation mark
You cannot use the period character consecutively in the middle of a file name.
You cannot use the period character at the end of a file name.
You cannot start a file name by using the period character.
If you use an underscore character (_) at the beginning of a file name, the file will be a hidden file.
ile names and folder names may not end with any of the following strings:
.files
_files
-Dateien
_fichiers
_bestanden
_file
_archivos
-filer
_tiedostot
_pliki
_soubory
_elemei
_ficheiros
_arquivos
_dosyalar
_datoteke
_fitxers
_failid
_fails
_bylos
_fajlovi
_fitxategiak
In addition, file names and folder names cannot start with the “_vti_” string, such as the followings:
_vti_cnf
_vti_pvt
_vti_bin
_vti_txt
