You probably look approachable. You also look like you are enjoying what you are doing. You are also doing things others don't do much anymore. People are curious. Try looking like you are working and you really aren't enjoying it.
I've been seeing people don't equate taking pictures with making photographs anymore. For many, it's a proof you were there and you had fun.... It's more of a documentation thing. Not for them, it's for others to see and comment on social networking site..... for next 10 minutes or so. Then it's all forgotten.