Mark Wilson writes: Bitcoin has been in the news for some time now as its value climbs and drops, but most recently interest turned to mining code embedded in websites. The Pirate Bay was one of the first sites to be seen using Coinhive code to secretly mine using visitors' CPU time, and then we saw similar activity from the SafeBrowse extension for Chrome. The discovery of the code was a little distressing for visitors to the affected sites, and internet security and content delivery network (CDN) firm Cloudflare is taking action to clamp down on what it is describing as malware. Torrent proxy site ProxyBunker.online has contacted TorrentFreak to say that Cloudflare has dropped it as a customer. The reason given for ProxyBunker's suspension is that the site has been using Coinhive code on several of the domains it owns.