No 2-wire to 3-wire adapters here, but we've had our share of overloaded outlets with multi-way adapters as well. The better types incorporate a standard plug fuse to at least provide some extra protection.
Bayonet-cap lampholder to 2-pin outlet adapters used to be very popular for electric irons years ago.
Another problem is that some of the cheap imported plugs sold these days have very flimsy, thin fuse clips. They're fine for a lamp or TV, but on a 2kW+ load they run really hot and overheat the outlet.
I don't remember seeing one quite as bad this one though.
