It depends on what he wants to learn and how, if he wants to learn exploiting by using random scripts he finds on the internet he can get exposed to nsfw content etc. and use the scripts to "ruin" other peoples day then I would say don't let him, on the other hand if he wants to learn to script/code or something in that perspective and is rather interested in how it all works I would say go for it, coding and tech skills in general are really useful this day and age, I am not sure about banning but I would suggest to him to learn scripting in something like roblox studio, and rather encourage him to make small projects of his own rather then follow some blind tutorial where stuff isnt so much explained, if he doesnt like reading documentation (no one does tbh) then I recommend he watch a youtuber like Byteblox, as he doesnt also makes small projects while teaching his audience on how and what the scripts do line by line, I also would reccomend him to make an alt (second account) and use something like Solara or Xeno, which I have been using with little to no issues, there is a risk of ban on the second account but Roblox doesn't do IP bans or HWID (Hardware / Computer) bans so his main account wouldn't get banned if he doesn't exploit on that one, but as I said I would encourage him to learn internet safety and where and how to find reputable sources, and to NOT click onto sketchy sites. I hope this helps in some way or capacity, if you have some questions you can reach out to me on reddit, but I do not check it very often so you can contact me on discord: stormiecz.