Swingman wrote:
Back in the "old days' of the Internet, and the BBS's and FidoNet before
that, it was considered very bad manners to waste bandwidth by individually
thanking those who responded ... thus the "TIA" at the end of many OP
questions in those days.

Yet, so many (but not all by any means) of those who used TIA felt free
to waste endless bandwidth flaming people and arguing. They very much
often felt it ok to take issue with the answers, but not to offer
thanks, even aggregated.