Nginx anti-crawler strategy to prevent UA from crawling websites

vim /usr/www/server/nginx/conf/anti_spider.conf

#Disable crawling by tools such as Scrapy if ($http_user_agent ~* (Scrapy|Curl|HttpClient)) { 
   return 403; 
} 
#Disable access with specified UA or empty UAif ($http_user_agent ~ "WinHttp|WebZIP|FetchURL|node-superagent|java/|FeedDemon|Jullo|JikeSpider|Indy Library|Alexa Toolbar|AskTbFXTV|AhrefsBot|CrawlDaddy|Java|Feedly|Apache-HttpAsyncClient|UniversalFeedParser|ApacheBench|Microsoft URL Control|Swiftbot|ZmEu|oBot|jaunty|Python-urllib|lightDeckReports Bot|YYSpider|DigExt|HttpClient|MJ12bot|heritrix|EasouSpider|Ezooms|BOT/0.1|YandexBot|FlightDeckReports|Linguee Bot|^$" ) { 
   return 403;        
} 
#Disable crawling by methods other than GET|HEAD|POST if ($request_method !~ ^(GET|HEAD|POST)$) { 
  return 403; 
}
#The command to block a single IP is #deny 123.45.6.7
#Block the entire segment from 123.0.0.1 to 123.255.255.254#deny 123.0.0.0/8
#Block the IP range from 123.45.0.1 to 123.45.255.254 #deny 124.45.0.0/16
#The command to block the IP range from 123.45.6.1 to 123.45.6.254 is #deny 123.45.6.0/24
# The following IPs are all rogue #deny 58.95.66.0/24;

# Anti-crawler include /usr/www/server/nginx/conf/anti_spider.conf

λ curl -X GET -I -A 'YYSpider' https://www.myong.top
HTTP/1.1 200 Connection established
HTTP/2 403
server: marco/2.11
date: Fri, 20 Mar 2020 08:48:50 GMT
content-type: text/html
content-length: 146
x-source: C/403
x-request-id: 3ed800d296a12ebcddc4d61c57500aa2

λ curl -X GET -I -A 'BaiduSpider' https://www.myong.top
HTTP/1.1 200 Connection established
HTTP/2 200
server: marco/2.11
date: Fri, 20 Mar 2020 08:49:47 GMT
content-type: text/html
vary: Accept-Encoding
x-source: C/200
last-modified: Wed, 18 Mar 2020 13:16:50 GMT
etag: "5e721f42-150ce"
x-request-id: e82999a78b7d7ea2e9ff18b6f1f4cc84

FeedDemon content collection BOT/0.1 (BOT for JCE) sql injection CrawlDaddy sql injection Java content collection Jullo content collection Feedly content collection UniversalFeedParser content collection ApacheBench cc attacker Swiftbot useless crawler YandexBot useless crawler AhrefsBot useless crawler YisouSpider useless crawler (has been acquired by UC Shenma Search, this spider can be released!) 
jikeSpider useless crawlerMJ12bot useless crawlerZmEu phpmyadmin vulnerability scanningWinHttp collectioncc attackEasouSpider useless crawlerHttpClient tcp attackMicrosoft URL Control scanningYYSpider useless crawlerjaunty wordpress blasting scanneroBot useless crawlerPython-urllib content collectionIndy Library scanningFlightDeckReports Bot useless crawlerLinguee Bot useless crawler