These things will be orbiting around 20 km below Hubble, which typically points away from Earth.
Things above Hubble (and thence getting in its way) are much more likely to be in the (much) higher geostationary orbit, which is going to be equatorial by default. These are the things that are going to bugger up space telescopy.
I'm only talking about space telescopy here, since ground-based optical telescopy is pretty much redundant since Hubble went up, because of that pesky atmosphere being in the way, which is far more of an issue when trying to image things that are far away (or just small, Dougal).
Also worth noting that the 'next gen' James Webb is due to go up into the L1 Lagrange point, so nowhere near anything in Earth orbit...