Google fails for not filtering potentially offensive search-suggestion

I'm really not at all offended by the topmost suggestion offered by Google, but I understand that some people can be. So I term this possibly-offensive-to-some-suggestion by Google as a failure.

Google fails on a simple brand-name query

What does one expect as the topmost result on Google, when the query is as simple as wal mart? Google places the website of Wal-Mart at the tenth spot...

All 4 search engines fail because of unasked abbreviation-substitution

Why are all of these engines returning Mountain Zone, when I'm asking for MTN Zone? I term this cocky behavior as unsolicited oversmartness. I wish there was a feature that allowed me to turn-off this abbreviation-substitution, so that I can make it clear the the engine that when I type MTN Zone, I'm clear in my mind that I'm looking for MTN Zone, and not any Mountain Zone.