I've been to WDW many times....probably too many

I assure you though, our family has had many fun encounters with complete strangers all over WDW. There are too many to list.
Are you saying you avoid all WDW buses, monorails, the Jungle Cruise, etc. because there is the chance a stranger might sit next to you- close enough that a part of their body touches yours? Sorry, but it has happened to me a number of times on all of the above. I've even had complete strangers fall asleep on airplanes beside such that their head rested on my shoulder, or their arm came to rest on mine.
Two weeks ago, a young child I didn't know hugged me! I smiled. He was adorable. Yes, it was a magical moment. (though not at WDW)
More than once, young children have grabbed my hand or leaned against me (in queues) at WDW. I'm sorry, I just don't freak out when such things happen.
Maybe we are talking about two different things. Often when I ride the teacups, there is plenty of spare room, and it truly would not bother me if someone wanted to sit there.