I've been getting those gummy ads on youtube too, but I haven't given in. Although I do use a writing program that spell checks my chapters for me. Words are hard sometimes.
Mr. President, how do you suppose we respell 'There'? I can't see it being spelt any other way.
'Ther' is like the pirate version of 'there'. It makes me say it with an emphasised R, like a pirate's 'Arrrrr'.
Maybe all these silent 'e's is the boundary which truly makes us civilised.