Should this be blocked? Read: https://wordpress.org/support/topic/how-to-block-semaltcom-from-visiting-your-wordpress-website
See: https://www.mywot.com/en/scorecard/semalt.com?utm_source=addon&utm_content=popup
Re reactions: http://www.webperspectief.nl/semalt-spam-verwijzingen-en-nep-bezoekers-weg-er-mee/
http://wXw.web-stat.com/ is being blocked inside Google Chrome for me by an extension.
Filters: http://www.webperspectief.nl/wp-content/uploads/2014/05/semalt-blokkeren.txt
Is this bordering on malcode? Read: http://www.marketingpilgrim.com/2014/08/tips-for-blocking-semalt-and-botnet-attacks.html
polonus