Macro miners
From EVE University Wiki
A guide to macro mining
Macro Mining is the use of illegal 3rd party scripts to automate the mining process allowing a player to mine 23/7. Not only is it against the spirt of the game, it is also against the EULA of the game.
If you are found one of two options can occur, if the pilot who spots you doesnt like macro miners, theymay just suicde attack you. The other option is that CCP will delete everything within the account leaving you with nothing.
Summary
DONT USE MACRO MINERS
In case you missed that
DO NOT EVER USE A MACRO THEY ARE WRONG WRONG WRONG!