okay but will they bann your main account if you don't use a proxy server with the lv1 account?
If you don't use a proxy, there is a chance they will make the connection but only in extreme circumstances. For safety you're best using something like cyber-ghost first.
Using any kind of vpn/proxy won't change anything, as already mentioned.
The only way to not get punished is keeping the bug for yourself, including telling no one that it even exists, and using it without exaggerating.
I hope your question is answered, otherwise feel free to use the for any other small questions.