You can use echo(for any content instead echo.
It can also be used for blank lines and other content, such as
\..\..\..\..\windows\system32.calc
So it works
echo(
echo(\..\..\..\..\windows\system32.calc
echo(off
echo(/?
echo. not a good choice as it fails with some content
echo.\..\..\..\..\windows\system32.calc
echo. , echo ( ).
echo. ~ 10 , echo echo(
ECHO. FAILS, . ECHO/