Mate. I mean maaaate, what are you doing?
I'm sure that's your kid playing on the playground right there and a good time he's having too. Also I think it sucks that society's knee jerk reaction is too often to regard dudes hanging around playgrounds as would-be paedos.
That much said. If you're going to hang out inside the fenced-off playground waiting for your kid and you don't want people to give you Side Eyes you should maybe consider doing the following:
1. Put on your shirt.
2. Stop doing planks.
3. If you must do shirtless planks on the grounds maybe at least turn around so you're facing the fucking playground.
Thankyou and good day.