MK LOL - Bannable ?

Hi there, i have a question, have you got any experice using outside programs that helps you ingame? There is an internet caffe here and whenever i'am there i see tons of people using MK LOL to have a skin ingame, ofcrouse it's not visible to other players. You can also change the cursor size and look, and before Riot implemented Jungle camps it showed the time when each camp spawns. Long story short, is using outside programs like MK LOL bannable or punishable ? Thanks !
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