correct grammar and spellings are minimum expectation. The user means 'target' misspelt as 'targe'. Possibly, this is slip. Spellchecker should be provided. The target of the site and users is to increase common fund of knowledge and share it.
But that spell checker gives false information regarding words formed by two words.For eg: Eventhough is a single word which is underlined.If it is written as even though it is OK in this.Which is correct according to you?
The spell checker is a guide. If it is felt that the spelling is okay, it needs not be corrected even if so prompted by spellchecker. For example, 'Colour' may be shown wrong and 'color' correct. The British and American spellings differ. Moreover, Indian names will be shown as misspelt.