As a graduate in Linguistics, I'm not usually a snob about glottal stops, treating them as just a feature of spoken English.
However on Radio Scotland this morning I heard some comedian woman expressing her enthusiasm for "Twi?er" (the International Phonetic Alphabet symbol for the glottal stop is like a question mark without the dot; I don't know how to reproduce it here), and it was driving me demented.
I could feel my tongue tapping off my alveolar ridge in an attempt to make the stupid cow say /t/ properly, by some spooky telekinesis from my bus on the M8 to the BBC studios a few miles away! 
Twitttter! Twitttter! Twitttter!