I can't believe he stopped the ants just by putting some small pillars in the ground. I mean it makes sense, but it's one of those that you just don't want to believe is true.
@LazySage depending on their sight. Because if they can not really see and as they are not very flexible then some spikes could really prevent them from moving. Especially if you consider that with their size their feet shouldn't be able to climb up all surfaces. Spiders or gheckos can not be too big, otherwise the area of their feet can not hold their weight on too even surfaces.
Fire the translator. I keep reading your releases vs flames and vales and I'm always disappointed. Is this mtl? has it been translated from another language? This is not a proper translation.