We were asked "not to do this" in the neighbouring thread, so - yes, it is banned. Until this gets fixed (if ever) the question remains how to not qualify for this exploit.
One example i have in mind: in few of my games i neglected sailing line for a very long time and then bulbed scientists to accelerate myself towards some late game military tech, like flight. While i was unaware of implications of such move, it is clear now i earned some (quite a few, actually) "unfair" beakers in the process.
What would be the limits, is my question. I mean, i can research myself up to optics (do i have to now?) and then, while bulbing for flight i AM going to get unfair beakers from popping astro and navigation, just because they have been researched by other AI players. On one hand, I can't see myself being forced to prioritise sailing line in a land based domination scenario, but it is cheating (buggy), on the other hand, as these techs will be researched by most deity AI on their way to cultural VC.
In short, to avoid confusion, i would like to read a HOF staff wording for limiting exploit in question.