Seems like it's a tough argument though, I never have all my email on my phone, or all my dropbox files, etc. If I choose to not sync certain GMAP labels to IMAP, does that mean I am 'hiding' them?
What if I don't sync the data back to my phone until I return home? Is that concealing? Is it any different than leaving sensitive items from my wallet (say social security card) at home while I travel?