How do I wipe the data from a hard bricked phone I think I've hard bricked my Android, and the phone had sensitive private data on it while it was still functional. I plan to try and get it repaired, but is it possible to wipe this data first?
The very definition of bricked is that the phone is totally inoperable.  But on the off chance that it is just a screen problem there are a couple of possibilities.

Try the HDMI output.  See if there is any sign of life.  If so, then either using the screen digitizer or an external USB mouse, do the normal Settings, Backup/Restore/Set to Factory thing.  

Another idea is to try booting up a PC with a Linux LiveCD of your choice and see if you can access the phone at all.  If so, then go about deleting what you can.

If it is truly bricked, then perhaps it is time to go shopping.  Walmart Online has some good deals.