Removing permanent write protection from SD cards?

Is there any way to get rid of permanent write protection from SD cards?

I've been trying to switch my SD cards between my 3DS and my Camera (a Nikon D3100), and both seem write protected against any sort of change. Yes I checked the lock switches, multiple times and even played with various positions with no joy. Even tried some weird tape trick that failed to work as well. The cards seem permanently write protected, is there any way to deal with this?