Great replies from hosts below @Marco3529
I have learnt after 8 years, that basically I regret it when I take a booking with a guest low rating, or no rating. I know its unfair to those just starting out on Airbnb.
Thats why I do reach out and ask them their intent. I have instant booking on, so it does weed out most. I am basically looking for reason for me to accept them, because I'm in the mindset of no to start with. Even if they convince me and all signs are positive, invariably low rating guests may not even be aware they don't impress hosts and seem all nice and friendly and guarantee they will look after the place!!!
Having said that, I've rarely ever out right rejected a booking, I manage to convince them that maybe the property isn't what they were seeking and get them to cancel or just not book if its a query.
Here's something to not do as well. Guest says, oh, I don't have a booking profile but really really want to book, so I'll get my friend to book instead. Maybe this works out for hosts, but in my case, the friend booked, reviews were average (should have listened to my gut) and I had issues from the booking from the get go. Because the friend had no idea what they were booking, didn't understand the house rules, weren't coached by the friend that it wasn't luxury (as an example) and so the reviews, and how they left the house were not good.
So ultimately up to you. Want to take the risk? We are in the hospitality business after all, you will have some duds and need lots of flexible "let things go to the keeper" attitude, but the worst thing is not how they leave the property but if they leave a bad review 1 star review as a result. That's serious damage control if it hits your super host status. I've had to fight 2 of those in 8 years, both caused by "not normal" bookings where the guest review rating wasn't great. Not bad odds but it took time and perservance.
Good luck!
Kind regs
Mary