If by "few years" you mean "several months".I didn't mention it before (beyond a general comment about one-sided-nos on a different quote) because, frankly, it's a minor inconvenience to me; I simply can't assume the initial mention of a quote has implicit support (which is what I do if someone posts a link without any commentary of their own). I don't maintain the Index for my own convenience
But when you're agreeing with someone who's concerned over the inclusion of a quote that no one's wanted included, which was only brought up because you brought up....It seemed an appropriate time to mention the trivial impact to me.
Also, I see "unconvinced but unsure" as an entirely different matter to "don't include it". The former I can see value in bringing up in case others are more certain; the latter...well, historically we haven't had problems with quotes finding supporters, if supporters exist.