Feeding wild birds

Hello, we get a lot of wild birds around our building and I really enjoy interacting with them every now and then. I occasionally feed the cockatoos and the kookaburras from my balcony. They leave minimal mess and they only stay for under half an hour at very specific times of day (usually the cockies visit at 8am or 4pm if I am home). 

I am an owner of my flat however we have a nasty and vindictive strata exec committee who is waging a personal campaign against certain residents. They’ve come after me for feeding the birds, asking the strata managing agent to write me a letter demanding that I cease feeding all bird life around the building.

To me this is an outrageous breach of my civil liberties particularly as there is no bylaw stating you are not allowed to feed wild Australian fauna on your balcony (if they tried to put such a bylaw up I know enough owners who would give me their proxy to kill it). 

The strata managing agent is trying to draw the long bow that my feeding nuts to the cockies attracts “vermin” that shit on other people’s balconies. There is no evidence of this and furthermore the strata managing agent will not tell me what bylaw they believe me to be breaching.

So my question is, what would their next move be considering i’ve rejected their threatening letter and do they have any leg to stand on here? How can I protect my rights?

EDIT: Also worth noting that the exec committee mentioned above was recently rebuked by the CTTT which ordered the removal of any signs not related to a bylaw (they tried to put up a sign on the building saying no playing on the grass in common areas and another sign saying no feeding birds). One renter in the building even had to call the police on an exec committee member who has been harassing his family by trying to get his landlord to evict them. This is base, pathetic behaviour. Since when is the strata scheme the personal fiefdom of the exec committee?