I think I've disabled this about a dozen times now, and I expect at least a few more today :|.
That is: both of the computers I use, each of my browser profiles on both of those computers, as well as every single site in the Stack Exchange network.
This is something that really needs to have a single disable for all sitesThis really needs to have a single disable for all sites (either using cookies, if possible, or storing a setting on one's user profile, although this won't help with anonymous visitors).