Anyway, it’s no more a risk than guns or water on planes since it hasn’t happened yet; but among this security circus, it’s hypocritical to ban water and not li-ion batteries.

I think you mean flammable.

find an Android vulnerability and make several phones burn at the same time

I don't think that exists.

Inflammable and flammable are both adjectives that mean "easily set on fire". They have slightly different etymologies. In the case of inflammable, in- means "into" and is not a negation.

That doesn't matter here. Clothes might be flammable, but are not volatile enough to be labeled inflammable.

It’s not every terrorist's goal to walk away from their event.

No one’s downed an airliner with a two-part liquid bomb either, but you’re still dumping your water and soft drinks at security.