People who regularly mispronounce words (and are fully aware of what they're doing) have no idea how annoying they sound to people who do pronounce words correctly. It's like being forced to watch a soap opera and the only thing you notice is the quality of the acting or having to use software with a UI designed by a programmer. It makes you cry on the inside out of frustration. In worst case scenarios, on the outside too.
Please be more considerate to us! （　´Д`）