I've had the occasional one when touring, I had one youngish Irish guy who booked, arrived and walked saying I was nothing like my pictures all in under an hour lol, I am exactly like my pics, the laugh was he messaged to book me the next time I was in the area till I politely reminded him he'd walked the first time.
I honestly think a lot of them don't actually know who they are going to, they look at so many profiles they get stuff mixed up sometimes and have one image in their heads which is the wrong one for who they are meeting.
I had a very rare L&G at home last weekend, booked and arrived no issues, in comms he'd said an hour but asked if there was an option to extend once there, I said no problem, he came in gave me a hug and said OK great I am going to extend but I just need to go and get more cash out, where is the nearest cashpoint, I opened the door and directed him then went to change into my comfies as I new he wouldn't be back.
If he knew he may want to extend then he would have already had the extra with him, it was clearly his tactic to make himself seem genuine, I text him 15 mins later and told him to grow a pair and say he wasn't staying rather than lying and then gave him a nice detailed CE
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Put it out of your mind it and he are not worth stressing over x