The problem most concerning is the safety issue.
When you turn off the switch at the socket, with plug still on the socket, normal socket switch only cut off live wire, neutral wire still connected to the plug, and hence your appliance.

So if you reversed the life and neutral wire, the switch will just cut off neutral wire woth live wire still connected to your appliance.

So if somehow your earth or ground is not working and you touch yiur appliance, you might get shock from live.