I am extremely against this - Freelancer was a game designed as one when dying in game doesn't much matter sieges and PoBs are a great activity generators in the short run, they are fun first couple days If both sides participate.
But after that they are complete RP and entire house killers - where people start to win at all Costs,stop role-playing and get burned out and eventually the house dies out (Bretonia) in the long run.
And this is just player owned bases that aren't even canon and don't even matter much- I can't even imagine what would happen if important solars were to be sieged - it would eradicate any roleplay or any sense of fun from discovery where it is still left as people would try to win at all Costs.