Thermal imaging

[Marcello]

"IMHO the answer will be about modern lasers, not about those in 80s-90s"

Well it is not like everybody in the US Army got a
M1A2 SEP with the latest LRF by 31 december 1999.

"Some smoke grenades are designed to make a very dense cloud capable of blocking the laser beams of enemy target designators or range finders and of course obscuring vision, reducing probability of a hit from"

There is smoke and smoke. Bispectral smoke or burning oil will block even the thermals sights. Standard visual smoke or sandstorms can be penetrated by thermals to some extent.
It is unclear what is being talked about in the above passage "Some" might mean not all but only certain types. In the CCTT document the talk is about reducing/degrading, not blocking.
The issue is that this would be probably a rather onerous feature to implement, if possible at all, so the case for it would have to be rather strong.