As much as the usual cry-wolfers will hate this, I believe the silent majority of players would not actually be opposed to something like this.
After all, the BOP people really don't care much about NPC stations (unless it's a supply point). They might even welcome it as it takes off pressure off their POBs. The PVP crowd will PVP in an NPC base siege just as well as any other situation. The anti-POB gang(k) would also likely be indifferent. A siege is a siege, right, but since there's no boom here they might just not care? The PVE guys really don't care much at all, as they don't care about PVP after all. They might help out with repairs or shipping stuff though.
That only leaves the RP crowd that will really hate this (coincidentally the most vocal part of the population on the forums, and also the "glue" that keeps Disco from falling apart).
I will only say that focusing this much on Sci-Data seems like it would steal activity from other places. Ideally sieges should also be partially connected with regular trading, smuggling, military patrols etc. (The current POB ones have very little connection to the usual player activity so this might actually also be an improvement though).
Making more ways to obtain sci-data might actually help with that, though.
EDIT: limiting "what can be challenged" would also be a good idea.
