not fucking du and sie – again!

I just noticed over past few weeks – in a baumarkt you ask a worker something; if you have bad german skills and are obviously an auslander, 99% of the time they will “du” you in their reply -even if you used “sie” when you first spoke to them.

Is this “just being friendly” or is it a slight which they assume will go unnoticed? or is it just done because “that’s what everyone does”. Children are du, handicapped ┬ápeople are du, and stupid auslanders who cant speak german properly are du – stupid auslanders obviously dont deserve any respect, and if they dont like it they can fuck off back where they came from.