Calling it a publicity stunt and getting called a pedo in return is way out of line. Musk looks like he's lashing out and it makes you wonder if he does this regularly.
As with his questionable donations[1], this risks shifting people's opinions.
But I see that frequently. There was all the kerfuffle around head of Tesla Autopilot quitting over Musk behaviour that also descended to namecalling. That painter guy who took issue with Musk stealing his artwork that ended up the same. That earnings conference call which felt like it could go there. Not on Twitter there are lots of stories of management by yelling.
Probably not, as otherwise you'd see news like this frequently. After all, Twitter is public. So let's not generalize this incident too much.