@Jessica384
Yes, I have also put in as many of the restrictions as Airbnb allows you to. However, this doesn't filter out all difficult guests, so maybe you have been lucky. I have specified that guests must have positive reviews to IB, but they only need one review to qualify.
As is clear from other posts on these forums, many hosts leave positive reviews for guests despite less than positive experiences. Others are renting separate properities, have minimal contact with the guests and as long as they get paid and the place is left reasonably tidy, they're happy. The same guests could be a total pain when staying in your home with you.
My friends tell me I'm pretty relaxed, but I don't want guests staying who leave the front door open (this was frequent until I started mentioning it everytime in my welcome tour), sending my bills soaring by leaving doors and windows open in the middle of winter, lights on everywhere, taps running, fridge left open, oven left on, etc. etc. or smoking in the guest bedrooms, parking on my neighbour's driveway (damaging a formerly good relationship), late night noise distrubing other guests. The list goes on and on.
As most don't read the listing/rules properly, it's super important for me to explain some of this stuff when I show them around. Of course, I don't go through every little detail, just the ones I feel would be relevant to those particular guests. I get a sense of this when I meet them.
If guests are allowed to check themselves in and then pretty much left to their own devices, a lot of them would behave in ways that would drive me around the bed.