Look! A bot.
It is very VERY bot resistant. But its probably impossible to make it bot free entirely.
Ghost Yak
GW2’s anti cheat system works alot like Valve’s VAC ban system. The bans are delayed in order to make sure the ones coding the hacks don’t ever really know which cheat got detected.
This person who thought mining under the node and using teleporting was clever. It’s old and very likely rooted out. You won’t see him/her much longer.