I second this statement. The gray outs are a feature to let you know
the window that grays out is to busy to respond to your prompts. This
can be because the data entered is bogus or it is waiting for something,
like a website that is having problems. Sooner or later the program will
time out and you will gain control of the window again.

I like this feature because it lets me know that things are not locked
up, just busy. Other interfaces may just leave you wondering what is
going on.