If the site uses HTTPS and you're using DoS then this is not an issue. If you're extremely worried about this sort of things (which are bizarrely unlikely scena

If the site uses HTTPS and you're using DoS then this is not an issue. If you're extremely worried about this sort of things (which are bizarrely unlikely scenarios in first place) then you're already playing with fire by browsing the internet or going anywhere near these sites in general, because it's really not that hard to accidentally end up on these type of things (load wrong page, mis-click, whatever).