I think the worst part of that is ppl should mind their business! Wdw is plenty large enough that you can stay away from someone who chose not to wear a mask.
I think the next few weeks of gradual opening will answer a lot of questions. If we see an uptick in cases of Covid, then more steps will be necessary when Disneyworld opens back up, which could include mandatory masks. If at that point, they decide masks are required, masks are required. If you won't / don't want to, don't go. Plain and simple. Regardless of whether YOU think it makes a difference or not.