Comment The Opposite (Score 1) 494
Between inline spellcheckers and T9 input on my phone, I actually find my spelling improving.
An inline spell checker will tell you every time, patiently you've spelled a word wrong (as long as you don't have one that auto-corrects you), so the repetition teaches effectively. With T9, it's actually easier at times to spell out the whole word instead of trying to hack it to spell out the short hand phrases that used to be most efficient.