If a physician can feel comfortable sticking an arm inside a patient's rib cage and holding that person's beating heart in his hand, then words should never pose a threat. If, as a medical transcriptionist, the power of language can so severely rattle your nerves that you cannot manage to include common slang in your fund of knowledge, then you have no business transcribing medical reports. Spell checkers are not always available when people correspond by e-mail. This forum is not about correcting everyone's spelling in their e-mail messages. We all mistakes.
Content is what counts.
If someone is misspelling words or using poor grammar it might mean that the person is tired, has put in a long day, or is not able to use a spell checker. Some people are trying to answer their e-mail in real time while the meter is running on their Internet accounts. Please cut them some slack. You will, however, occasionally see postings from people who obviously can't spell or make a sentence. They may be doctors.