@Andrea1384 It's a good idea, but not possible as a setting on Airbnb. If you don't use Instant Book, you can assess the age distribution of each request and decline those that don't fit your requirements. Perhaps a maximum stay of 6 on Airbnb, but 10 for a platform that isn't as notorious for parties and let's you charge a real deposit.
I notice that some hosts who list on multiple platforms set different parameters according to the quirks of each.
@Andrea1384 I have the same issue. Have asked AirBnB to help/fix asap but none yet. It seems to me that since they ask how many adults and how many kids for all bookings, they we should be able to set that parameter so it matches to the appropriate ages. Even though I explain in detail in my listing and rules, I still get requests and questions. We have a Murphy bed and twin bunk beds unsuitable for couples and most adults. It could end up being a safety or damage issue if AirBnB doesn’t help tweak the setting.