Not being able to be near children without the fear of being seen as a creep or a pedophile.

I always try to make it obvious that I am with them or I am the one responsible for them somehow.

I don't have kids but I have been through this a couple times as I am 29 and took my much younger cousins (12 to 15 at the time) to a park with a skate park inside to teach them longboarding. You get some obvious looks, you feel threatened sometimes, especially passing by groups of younger women. I even avoid this scenario now, I could be linched or something. Only some guy who have been through this knows how frustrating this feels, being treated as a predator.