Earplugs work great. Give some to your neighbors.

I think you should punish them for their insolence by getting multiple 100 watt stacks and crank them to ten. But also, to make it more painful, you should playing something obnoxious like "Camptown Races" while using pinch harmonics over and over again. I'll bet you can clear a bar doing that, or test the boundaries of your relationship with you significant other.