Not a scam but have seen a few post about peoples' fear of strangers when abroad. This was a few years ago but I decided to share. I had just been to the booking office in Sevilles Santa Justa station to book some tickets for the following week to Malaga. When I left the station i seen and heard two american girls discussing how best to get to the hostel they were staying in, so I asked if they needed any help and where they were meant to be staying. It was the same hostel i was at so i said i am going back there now if you want to come with me, they said yes so we got the bus outside the station to the hostel and got them booked in. The two girls were very grateful that I had helped them after they were unsure of their bearings when they had just arrived in a strange place. They offered to buy me a drink at the hostel I declined and instead bought them one as a welcome to Sevilla.
It felt good knowing that I had helped them out and that they were so grateful, i hope if i was in a similar situation somebody would help me in a similar way. What i am trying to get across is not everybody who tries to help you is trying to scam you and alot of people do genuinely want to help, yes be alert and on your guard if something seems off then just walk away but the vast majority of people IMO our kind helpful people willing to help out tourists who are lost or need help.