When my lad was 6 his school closed for a day (some sort of staff training) so I took him swimming at the local pool which was full of mum's and pre school kids...
As a 35 year old male the looks of horror that were thrown at me for the duraton of my swim (Oh my god, a lone man and a child..!) meant that was the first and last time I did that outing.
On a plane, frankly the further away other peoples kids are from me the better, most adults too for that matter!