I think if they are interested in the conversation it is worth throwing more than a drive-by &quot;srs pls&quot; comment into it.<p>For example it could have been &quot;Well I think the budget is a bit off, CIA itself doesn&#x27;t get that money, did you mean the total intelligence budget&quot;.<p>Or &quot;Agreed, do you have any sources for the fighters who switched side? that would be interesting to see&quot;.<p>Imagine you are sitting by the fire and discussing something, and someone just chimes with &quot;src pls&quot;, &quot;srs pls&quot;, I wouldn&#x27;t consider them contributing to the discussion, rather derailing it.<p>So I agree, source would help here, did provide sources but responded snarky to give the person asking for them a hint (not so subtle, perhaps) that in general that is not a constructive way to hold a conversation.