The post was not baseless. If you are going to WDW - or any place where large groups of people congregate - you are substantially increasing your risk and the risk of everyone you come in contact with for several weeks - and everyone they come in contact with. If you are flying to WDW, it’s significantly riskier.
This is a lousy situation. People shouldn’t panic, but they should behave sensibly and minimize risk. The worst thing do to, however, is to put your hands over your eyes and pretend the lousy situation isn’t there.