Give a listen to new Mexico City band Raters. This three piece play extremely noisy minimalist punk with just a guitar, drums that sound like garbage cans, and a megaphone. The only reason I found out about this band was because they were following me on twitter. Thanks guys! It doesn't seem like they have any upcoming shows, but they do have a CD you can either buy online or at El Botiquín in the Centro Histórico. You can also download their songs for free from Bandcamp.