" Do you think members who post these kinds of questions, replies; do the same in their day jobs too? "
Yes and No...............A Lot have poor English and their verbal communication is not understood all the time, however, 80% it is a complete different story when it comes to writing, 20% you would not be able to make up if this was originally meant to be in English.
I would agree that we are not here trying to make fun of poorly written inquiry, but also it is not a bad idea to read your posting, make sure it could be understood, and the message is clear, prior to click Post.
And in case you are in doubt whether your posting in English is clear or not, turn off all your native music, movies, and try to listen and read more English.
It helps a lot, i know it helped me quarter of a century ago 
Hope my English is clear enough.
For the fun of it: 23 years ago, i was on the phone with another member of the congregation, i am trying to give out the mailing address, then he stopped me to ask if the second word starts with a "B" like boy or a "B" like Beter ! Yes it took me more than 45 seconds to realize what he meant.
Cheers !