TOD:
Irritants include the MISpronounciation of "mischievous". It is THREE (count 'em 3) syllables only. No alternative pronunciations exist...except in people's minds.
I find that texting on my phone is a major challenge when it comes to letters, but it's not the "t's" that get me. I can be typing and "sddnly, ll my vwls" seem to vanish even though I know I typed them. It is very "rrttng"! (that was "irritating" without the vowels).
As for the missing "t's", I notice that many people talk in a way in which they do not prounce the "t" making the words seem choppy. "Oh, I live in ManHA-en" is an example, in addition to "First, you BUH-en your shirt...". I expect its a path toward a shift in speech patterns influenced in many ways by Ebonics and Valley speak, etc.