Warnings

When you first install Gravity, it asks for confirmation when you execute certain commands.  This prevents you from doing something you might regret. When the warning box appears, you can check the “Don’t display this warning next time” box to disable the warning. 

To enable or disable warnings
Tools - Global Options - Warnings
If you have disabled certain warnings and want them displayed again (re-enable), use global options.

Other Warnings
If the warning is not listed in global options, it is hard coded in the program. These can not be turned off by the user.
Hard coded warnings might deal with netiquette, such as posting articles with lines longer than 80 characters, excessive cross-posting, or if you reply with mostly quoted text.
Or, they may be functional warnings, such as unsubscribing from a group that has protected articles.
Even though these warnings are hard coded, you can usually proceed anyway.