For moment, some badbots can very aggressive.
There a solution to block this elements via your htaccess
##################################
# Bot
##################################
#Rules to block bad bods from accessing web pages on your site.
#Remove or add more rules as per your needs.
BrowserMatchNoCase "Baiduspider" bots
BrowserMatchNoCase "SemrushBot" bots
BrowserMatchNoCase "Yandex" bots
BrowserMatchNoCase "BLEXBot" bots
BrowserMatchNoCase "AhrefsBot" bots
BrowserMatchNoCase "DotBot" bots
BrowserMatchNoCase "Exabot" bots
BrowserMatchNoCase "SeznamBot" bots
BrowserMatchNoCase "aiHitBot" bots
BrowserMatchNoCase "spbot" bots
BrowserMatchNoCase "MJ12bot" bots
BrowserMatchNoCase "oBot" bots
BrowserMatchNoCase "DeuSu" bots
BrowserMatchNoCase "ia_archiver" bots
BrowserMatchNoCase "MetaURI" bots
BrowserMatchNoCase "FlipboardProxy" bots
Order Allow,Deny
Allow from ALL
Deny from env=bots