@Adrian291 I had the exact same situation when I first joined up back in March. I had back to back requests from people who had just joined. Being new, I was concerned they were some type of scam as well. I declined the one, without a photo or any other information. She had also asked about dogs when my listing clearly states no dogs allowed.
My place is in a very small market, with only about 20 homes on AirBnb, so later on when I was reading some reviews on competing properties, I saw that person had indeed stayed at one of the other places and thus was legitimate.
Since then, I've gotten several requests from people who have just joined and I have accepted them all. Most of them had at least a few things like photos and a few verifications, but two of them have not. I have simply welcomed them to AirBnb and explained to them that the AirBnb community is built on trust and that almost any host will ask them to upload a photo, create some verifications and add a little into to their profile. They both seemed happy that I explained things and ended up working on their profiles and then booking, being great guests.
Hope this helps!