if the system were actually flawed then yes it would be a workaround. if you are in game and hit /afk but use the ALT or Windows key-modifier to minimize the game. then obviously the game is still in focus will accept user input and register that as you not being AFK. using a macro is not a workaround. using a macro gives you the chance to bend the rules. but on that last half i can most certainly agree... provided you didn't touch any controls. lol.
again... i know players in-game that have experienced these so called issues. a macro works great for them. and even the players with an overly-sensitive mouse found the macro suggestion to work very well.
anyhow it doesn't matter. whatever this fabricated issue is, SE is doing something about it. enjoy and cheers.