A few thoughts on auto

I've noticed that using auto software requires a lot of sub-accounts. Typically, they use a main account and then use software to support the sub-accounts that follow that main account. Identifying this as auto software is very difficult. So, is there a way to prevent accounts that have completed act 10 from party with other accounts and completing that level together?
For example, we could change the mechanism of evenly distributing experience points between party to a "last hit" system. Or we could prevent accounts that have completed act 10 from returning to older act. Instead, there would be a separate mechanism for them to complete unfinished quests. Having a separate guide on how to obtain missing points in the end game would also be helpful, as there will be new players unfamiliar with the /passives command. Additionally, there are a few useful things from the old act, such as crafting recipes.