Well said. I will be a solo traveler at WDW this fall. I am a fifty-some man who happens to be widowed. If you have never been through the pain this causes personally, you just do NOT understand. I will not be able to ride ANYTHING with the person I would like to ride with. I don't have any choice as to who I ride with or even IF I ride with anyone. That is determined by the CMs. TSMM is certainly more fun when you ride with someone, even a stranger.
Furthermore, the CMs are hard-working people who are trying their best to make the best possible experience for EVERYONE. Believe me, I always try to do the best I can to follow their instructions because I know that this is the best thing for everyone. If a CM tells me to take a particular seat on a ride--ANY ride--I am following that instruction. I am in Disney to have a good time, and will tend to be in a good mood. When I am seated next to someone, I will tend to be friendly. Certainly someone who gives the impression they want to be left alone, I will do so.
If you don't like me sitting beside your child, that is YOUR problem, not mine. I am doing what the CM said to do and trying to have a good time. It is NOT my responsibility to sit out because you don't like where the CM put me. I am not trying to be a downer to anyone's time at Disney, but if you act so entitled, I will not budge.