1.   If warnings remain unheeded, the agency will file federal charges of fraud against spammers.

2.   But all these signals remained unheeded.

3.   Kurdish rebels warned Monday of an escalation of attacks on Turkish targets if their leader Abdullah Ocalan is executed and his calls for peace remain unheeded.

4.   The labor federation has threatened another strike if its demands remained unheeded.

5.   They also threatened to take more drastic action if their objections remain unheeded.