I hate when people say things like "4am in the morning" as am/pm is already used to designate that.

also...

when they get money from the "ATM Machine" when ATM is an acronym for Automatic (or automated) Teller Machine. It's like saying, "I need to get some money from the Automated Teller Machine machine

and...

When people say that they "could care less" - maybe those people SHOULD care less if they could (?) I think they mean that they "COULDN'T care less"

Wow! I sound like a nitpicky prick!