Hacked accounts make cloud services vulnerable. Back them up if they contain sufficient value to you. |
Google wipes all your data (easy and cheap "sanatizing"!) before returning your account, in some cases when an account gets compromised:
Your DropBox.com account gets hacked and all data removed:
There are a number of services which promise to regularly back up your Google docs (Drive), email, calendars, and contacts. We're sure none are panaceas. However, they do seem to represent reasonable protection for restoring a hacked (and subsequently blank-slated!) account. You may also value being able to recover an individual item mistakenly delete. (Seems easy to restore specific docs and emails, for example.)
Oliver personally uses (9/2013) Spanning Backup. Usually costs $40/year, but you can save $5 by using Oliver's discount code if you decide to subscribe:
Full disclosure: If you use Oliver's code, he'll get a $5 referral fee from Spanning Backup. He recommends using their 14-day free trial to test-drive first.
Here are some promising, but untested, tools and services: