Disable / ignore / redirect URLs with query strings to reduce blog spam

[TinyApps.Org]

Hello all,

Is it possible to disable / ignore / redirect all URLs
with any query string? My site doesn't use query strings,
and is suffering from blog spam links as described by
these folks:

How do I remove spam from my blog's Google Blog Search results?
http://www.google.com/support/forum/p/Webmasters/thread?tid=126184f38f712907&hl=en

Google has the wrong (somewhat vulgar) URL for my site!
http://www.google.com/support/forum/p/Webmasters/thread?tid=1e30ee39f9e82b4d&hl=en

URL/Query String Spam - Poor Man's Referer Spam?
http://www.dgibson.net/blog/article.cfm/articleid=7/URLQuery-String-Spam---Poor-Mans-Referer-Spam

This Apache .htaccess example < http://briancray.com/2010/03/18/htaccess-hack-remove-url-query-strings/ >
removes all query strings like so:

RewriteEngine On
RewriteCond %{QUERY_STRING} !="" 
RewriteRule ^(.*)$ /$1? [R=301,L]

Can something similar be done in nginx? Also, might it be
better to simply return a 204 (or some other status code)
to reduce server load?

Sincerely,

Miles