Try the Deviation Storage Tool. It does exactly the same as deletion, but it's reversible.

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Anu belore dela'na.

This come up often, along with suggestions on deleting comments...
dA is quite anal regarding stuff retention, they often don't want to make deletion easy (with a surprising exception in the Friends List page).
They also probably don't want to ease such task to avoid flooding Help Desk with calls: "Help me, I deleted more that I wanted, can you restore my deviations?".
By making the process tedious, at least they make sure you know what you are doing. It is too easy and fast to check lot of checkboxes and hitting Delete without double checking...
Hence the reversible storage tool in ublic"Deviation Management page!

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82% of statistics in signatures are made up. (This is a recursive signature...)
Spreading them is un-original and sheepish. If you agree, copy this in your... wait, no!
No to signature clichés! You are on an art site, be creative!

Yea, they could have maybe three or four warning messages. I'm sure the ratio of us wanting to intentionally deleting everything is greater than the people that accidentally delete everything. Or at least have the thing like Livejournal where you have a month if you change your mind and want to reverse the deletion.

But that's the easy answer, right?

lol...seriously,that would make it so much easier...especially when you want to clean out your old deviations

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