Immature Gmail Exploit

The Gmail Android client helpfully puts the first letter of the name of the person who emailed you in a big block at the left of the mail list (I guess if you have Google Plus friends you probably get a photo instead). But it's pretty easy to change the from name in your email client and trivial to do this programmatically.

Tips... spell your message backwards and use a different subject line for each email so they don't get grouped together.