The internet is a cold sterile place, it is hard to judge a persons character and intentions through a simple post, i agree though a simple please and or thank you can help, though i have met people who are full of please and thank you's and were quite cold in person, also have met some who dont type more than a line who were very warm and pleasant in person. Plenty of times i had preconceived ideas of of a persons nature before meeting them only to be caught off-guard when face to face.