Yes, Margin Call is an option.
People will hate it when thinking “I will top up another 3% to make sure I keep my short positions. And another 2%. And another 4%. God, it is still rising! And then I lost everything thanks to Freetrade because I could never blame myself, could I?”
Do not get me wrong, I would fully support leverage trading, but prefer less risky options trading, where you genuinely have no room for more losses/expenditure [to cover the margin call, for instance] after you buy puts/calls (and even that does not seem to be coming into play).