High loads would then be concentrated at the outlet known to be equipped for them, making its heavy usage a self-fulfilling prophecy. In contrast, every double socket in a normal home wired with BS1363 sockets on 32A circuits is capable of supplying 4.6kW, therefore there is no inclination to concentrate load at a single 'special' socket. Whilst there is nothing to prevent 26A total being used, the effects of such usage persisting long enough to cause damage would be buried in the noise of random differences between different brands of socket, plug and operating environment. I have studied many damaged sockets and have never seen any where excessive combined current was definitely responsible for damage, absent other problems like improper cable termination.