The option to turn it off in the module is preferred. Don't forget about those of us on hosted shared servers that don't have access the images folder to make these updates. This has been very frustrating for me.

This is more a core issue than something tied specifically to just the feedback module. In the past, one of the ways I've worked around this is by adding a visible="false" attribute to the dnn:label itself on the feedback form - this essentially should hide the blue question mark image beside each label. This should also not require a re-compile of the module.
Sanjay

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The best, and the only way to get around it is to use asp:Label instead, and replace ControlName with resourcekey, get rid of the Suffix, and place the literal suffix along with the text in the resource file. That works fine for my modules.

Hope that helps,

Val