Oh, it's all good. I know there are thousands of people who visit and have different experiences so I was curious as well.
Not sure if it's official protocol or just my own experience but I think the characters are very much trained to appreciate/respect personal space. If you ever watch a character with a little girl or boy and they seem extremely shy or about to cry, the characters will immediately turn away and ignore them until they seem more open to a meeting.
This happened to me when I went on a trip with my cousins and sister. My little cousin was 3 and despite never having a problem the previous year, that particular year she wanted nothing to do with any male characters. It was the Pirate and Princess Party (ah, memories) and we were meeting Ariel in her Grotto and Prince Eric was surprisingly there (which made me and my sister VERY Happy). Well, when my little cousin started to go toward Ariel, she started to cry because she wanted nothing to do with Eric. so he backed away and said 'I think I am going to look at some treasure over here' and got out of the way so she could meet Ariel alone. Just to add, me and my sister made sure Eric was NOT alone at this time, lol Gotta love those magical moments, lol
That same trip, we were in Epcot and were in line to meet Princess Jasmine. Well, during our wait, Jasmine had to leave and Aladdin came out and took her place. My sister and I were NOT complaining but little cousin...yep, NOT happy. She covered her eyes in her hands and almost started to cry when Aladdin had just got her autograph book and was like 'I'm just gonna turn over here and sign this for you' and when he was done he very quietly offered the book back to her. She very timidly went to grab it and he pulled it away. he did this a few times till she broke into a smirk. 'I do this all the time with Abu' he said. She ended up finally coming around and got a picture and was fine the rest of the night.
I'm sure your character was just trying to lighten the mood but If you experience it again and just don't feel like you want the picture, just give a firm decline and I'm they will respect you.