RewriteRule .*[Jj][Pp][Gg]$|.*[Gg][Ii][Ff]$
You need to do something with it here.
RewriteRule .*[Jj][Pp][Gg]$|.*[Gg][Ii][Ff]$ - [F,L]
at a minimum
RewriteRule .*[Jj][Pp][Gg]$|.*[Gg][Ii][Ff]$
http://www.domaintogoto.com/ [R,L]
if you wanted to redirect it