Um, bats are a vital insect control mechanism, and if you think the bugs around here are bad now... if bats go away you can multiply the number by about 6 or 7. Might not seem like much but it can throw entire regions food chain out of balance creating lots of instability and more disease and tertiary issues like pollenizer decline which leads to decline & change in plant species distribution which then affects other things.
Everything is linked.
They could be relocated if needed, been done before.
Next stop the square, journal square station next!