>>from your very first posting; as a matter of fact, it was the lead-in. 
quote:
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Originally posted by Blammo 
Just a note, "ace": the next time some one gives you a salute, the idea is to give one in return, say [sic] thank you, or don't say anything. 
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Shane doesn't know how to use [sic] 

"This word is sometimes inserted in a quotation [sic], to call attention to the fact that some remarkable or inaccurate expression, misspelling, or the like, is literally reproduced. "
If you corrected the verb tense or spelling in a quote, you wouldn't use "[sic]".  I the case above "[say]" would have been acceptable, as it notes you've corrected the grammar or spelling. And if you do use '[sic]' in bold quotes  (italicized etc.), "[sic]'  should be in plain format,i.e., not bold or italics.
FYI 

This English lesson has concluded...
SIC!