My latest pet peeve is s-backing. That's pronouncing an "s" sound as "sh." Example: understand becomes undershtand, street becomes shtreet. When you start listening for it, you hear it everywhere.
Also, pronouncing "t" as "ch," so Youtube becomes Youchoob. I think that's called yod-coalescence.
So many! Do they normally live in groups? I've only ever seen one at a time.
That reminds me of a story a friend of mine told me. Her son was an undergrad at the University of Arizona in Tucson. There is BLM land (public lands) around Tucson and he went hiking and camping on them with some of...