I would rather know if the post was accurate. TY's will not accomplish that. What if I posted you could transfer TYP's to AA? I would get a lot of TY's until they found out it was BS.
...and then you would have the crap flamed out of you, and the truth would be known.
But barring some cases of abuse, I think it would be useful overall.
Also, people would only give TYs if they were indeed thankful. Something like the example you gave is a case of pure speculation, and I for one wouldn't thank you unless I corroborated via a reliable source. And once I did... All the more reason for you to get a TY, for bringing it to my attention in the first place.