As long as our military activities stop short of constructing a deathstar
Aside from the flip subject line I do think there should be limits to what we do militarily in space.
We do not want an arms race up there. Military things we do up there can either promote, deter or have no effect on the arms-racieness. We should avoid the ones that promote.
And we should avoid the mind-set that we must do everything we can, develope every capability, because someone else might. When any state follows that path then there is an open-ended arms race in place, and it is impossible or really difficult to back away from it.