Twice this week already I’ve been locked out because someone has switched off
"switching off" and actually going thru the steps to click on the "concede / forfeit" button are two different things.
but I agree, it is annoying and unsportsmanlike when you encounter players who rage quit without taking formal steps to concede their match - especially if it can cause a logic hangup and prevent you from properly winning your match. and some likely have learned doing so may increase their chances of stealing a win and that is why they try to do it possibly without conceding properly.
the formal rules of match play golf - allow for a player to "concede" their match or what most people call forfeit on WGT.
in fact it is actually respectful to properly "concede / forfeit" imho, unless you really want to practice and waste ball hits, especially since WGT charges everyone essentially to play based on ball use.