Are custom skins safe to be used and can you get banned for using them? Riot Games has made a statement about using custom skins where it says that it’s allowed, as long as they meet a few conditions.

In summary:
– “custom models and artwork sit firmly in the “use-at-your-own-risk” category”
– “Riot Games reserves the right to take action against applications that allow the use of our assets for free (often referred to as skin hacks).”

Read the full article on Riot Games’s stance is on the use of CSLOL Manager.
https://support-leagueoflegends.riotgames.com/hc/en-us/articles/225266848-Third-Party-Applications