[subbu]

The reverse is also true. For every obfuscation tool there will be an unobfuscation tool. They may not give back 100% of the original source but they can go close.

[sjs]

There are SWF decompilers too.

http://www.google.ca/search?q=swf+decompiler

If HTML5 authoring tools start appearing we'll have to make sure they use open formats and runtimes.