Feature Suggestion: Fatal actions guard/Execution warnings.

[jcouture100]

Protects you from running DML statements (UPDATE, DELETE) without WHERE clause.
DROP/TRUNCATE TABLE is handled as well.

If user tries to run an update or delete statement without a WHERE clause, or run a script that includes DROP or TRUNCATE, then a message box is displayed informing them of that fact and they are asked if they want to continue.

Both dbForge SQL Complete and SSMS Boost have features like this (see screenshots)