Hey there,

It's not possible to limit the gang assaults, it's a main feature and the most exciting in the criminal life, and for the new players they have to learn the ways of how to avoid it and trying to assaulting the other gangs as well,
- Never think that you can't be a top player, each top player here started like a newbie.
You just need to create your own strategies for win, and thanks for your suggestion.

Regards,