The principal issue is attempting to wow classic gold do anything that isn't the zombie infestation gets challenging to perform, largely because player zombies like to hangout at quest givers and other areas where plenty of players tend to gather. Because this event also comes with an entire questline that occurs in the zones around Stormwind and Orgrimmar, there is ample opportunity to camp out and potentially infect as many players as possible. However, one positive shift from the last time that the zombie infestation occurred is that Blizzard appears to have made it more difficult to disperse it to the rest of Azeroth. Among the first things I did when I got infected was to hearth into Dalaran, but when I arrived, I was not infected anymore. However, I managed to carry it to Boralus through using the portal site in the mage tower, so it's not a perfect program yet.
The major point to understand is two separate events are going on. There is the scourge invasion and the questline, which takes players to Icecrown and sends players on a goose hunt for Nathanos. Then there is the zombie infestation, which adds just a bit of a PvP aspect for everything. It isn't surprising a few folks would want to get involved in the first event but not the second, as not everyone enjoys PvP or using their course and race skills removed and replaced by additional skills. Blizzard could produce the infestation only active for one of the weeks of the invasion, however, that is no fun for anyone who misses that week and would want to participate. An infestation is essentially a PvP event , so being able to opt-in with Warmode makes sense. Even doing something at which for most of the invasion, players had to opt into the infestation by selecting Warmode, but then at the previous week, even before Shadowlands dropped, the infestation could influence everyone, would most likely be the best solution.
This past week Blizzard announced they are having players vote for the next mount, wUpgrade your Luggage as quickly as buy classic wow gold possible