Actually depending on the extent of your activity they will ban your IP, or the accounts used on your IP. Or atleast they used to.
^It is very easy to change your IP, yeah, but some people can't be bothered.
IMO why bother mining essence? Thats something the throw away account IS GOING TO get banned for, and it isn't even great cash per hour.
If you think 200k an hour is really good, there are a lot of money making methods that would make you wet yourself.