Anti Aspirateur de site

Bonjour,

J'écris ce message simplement pour que des connaisseur en la matière puissent m'assurer que mon .htaccess ne soit pas trop restrictif pour la navigation de mes visiteurs, ou bien surtout pour les moteurs de recharche et leur robot. (J'ai simplement le BUT de bloquer les aspirateurs de site internet).

RewriteEngine on   
RewriteCond %{HTTP_USER_AGENT} ^-?$ [OR]   
RewriteCond %{HTTP_USER_AGENT} Advanced\ Email\ Extractor [OR]   
RewriteCond %{HTTP_USER_AGENT} almaden [NC,OR]   
RewriteCond %{HTTP_USER_AGENT} @nonymouse [OR]   
RewriteCond %{HTTP_USER_AGENT} Art-Online [OR]   
RewriteCond %{HTTP_USER_AGENT} CherryPicker [OR]   
RewriteCond %{HTTP_USER_AGENT} Crescent\ Internet\ ToolPack [OR]   
RewriteCond %{HTTP_USER_AGENT} DirectUpdate [OR]   
RewriteCond %{HTTP_USER_AGENT} Download\ Accelerator [OR]   
RewriteCond %{HTTP_USER_AGENT} eCatch [OR]   
RewriteCond %{HTTP_USER_AGENT} echo\ extense [OR]   
RewriteCond %{HTTP_USER_AGENT} EmailCollector [OR]   
RewriteCond %{HTTP_USER_AGENT} EmailWolf [OR]   
RewriteCond %{HTTP_USER_AGENT} ExtractorPro [OR]   
RewriteCond %{HTTP_USER_AGENT} Fetch\ API\ Request [OR]   
RewriteCond %{HTTP_USER_AGENT} flashget [NC,OR]   
RewriteCond %{HTTP_USER_AGENT} frontpage [NC,OR]   
RewriteCond %{HTTP_USER_AGENT} Go!Zilla [OR]   
RewriteCond %{HTTP_USER_AGENT} HTTP\ agent [OR]   
RewriteCond %{HTTP_USER_AGENT} HTTPConnect [OR]   
RewriteCond %{HTTP_USER_AGENT} HTTrack [OR]   
RewriteCond %{HTTP_USER_AGENT} Indy\ Library [OR]   
RewriteCond %{HTTP_USER_AGENT} IPiumBot\ laurion(dot)com [OR]   
RewriteCond %{HTTP_USER_AGENT} Kapere [OR]   
RewriteCond %{HTTP_USER_AGENT} libwww-perl [OR]   
RewriteCond %{HTTP_USER_AGENT} Microsoft\ URL\ Control [OR]   
RewriteCond %{HTTP_USER_AGENT} minibot\(NaverRobot\) [OR]   
RewriteCond %{HTTP_USER_AGENT} NICErsPRO [OR]   
RewriteCond %{HTTP_USER_AGENT} NPBot [OR]   
RewriteCond %{HTTP_USER_AGENT} Offline\ Explorer [OR]   
RewriteCond %{HTTP_USER_AGENT} Offline\ Navigator [OR]   
RewriteCond %{HTTP_USER_AGENT} Program\ Shareware [OR]   
RewriteCond %{HTTP_USER_AGENT} QuepasaCreep [OR]   
RewriteCond %{HTTP_USER_AGENT} SiteMapper [OR]   
RewriteCond %{HTTP_USER_AGENT} Star\ Downloader [OR]   
RewriteCond %{HTTP_USER_AGENT} SurveyBot [OR]   
RewriteCond %{HTTP_USER_AGENT} Teleport\ Pro [OR]   
RewriteCond %{HTTP_USER_AGENT} Telesoft [OR]   
RewriteCond %{HTTP_USER_AGENT} TurnitinBot [OR]   
RewriteCond %{HTTP_USER_AGENT} webbandit [NC,OR]   
RewriteCond %{HTTP_USER_AGENT} WebCapture [OR]   
RewriteCond %{HTTP_USER_AGENT} webcollage [OR]   
RewriteCond %{HTTP_USER_AGENT} WebCopier [OR]   
RewriteCond %{HTTP_USER_AGENT} WebDAV [OR]   
RewriteCond %{HTTP_USER_AGENT} WebEmailExtractor [OR]   
RewriteCond %{HTTP_USER_AGENT} WebReaper [OR]   
RewriteCond %{HTTP_USER_AGENT} WEBsaver [OR]   
RewriteCond %{HTTP_USER_AGENT} WebStripper [OR]   
RewriteCond %{HTTP_USER_AGENT} WebZIP [OR]   
RewriteCond %{HTTP_USER_AGENT} Wget [NC,OR]   
RewriteCond %{HTTP_USER_AGENT} Wysigot [NC,OR]   
RewriteCond %{HTTP_USER_AGENT} Naja [OR]   
RewriteCond %{HTTP_USER_AGENT} webdownloader [OR]   
RewriteCond %{HTTP_USER_AGENT} Zeus.*Webster [OR]   
RewriteCond %{HTTP_USER_AGENT} Zeus [OR]   
RewriteCond %{HTTP_REFERER} ^XXX   
RewriteRule !^avertissement.*$ /avertissement.php3 [L]  

C'est niquel pour bloquer les aspirateurs de site internet ?
Cela ne bloque pas les robot des moteurs de recherche ?
Cela ne gènera pas la navigation des visiteurs ?