HI there and Welcome to HealingWell!
I think its terrible that people are bullied because of their epilepsy. I was bullied at school because of it and I think it is because of a lack of awareness. I am so sorry that you and your family have had to go through this, but like you say, what goes around comes around and they will certainly get thiers!
As for the whole tongue swallowin debate... Its a no. Its a physical impossibility. The end of the tongue can flop back on itself, partially blocking the airway but its unlikely to stay there.
Best Wishes
Darren