We don't have any evidence outside of their word for this. If they can provide evidence of other people having pro-Biden flags or signs on their balcony then they have an actual legal case to bring against the management company. My apartment complex bans all flags and decorations from hanging on the balcony.
This is all dependent on the rules laid out in the lease. We lack that information to really make an opinion here.
I doubt that building management have the rights to prevent the hanging of political statements, but perhaps.
They can probably ban flags in general, or things attached to balcony railings in general.
This is true, but relatively few places actually do that.
Hastily scribbles in only good, ahem, commie flags allowed rule.
She said the rules say nothing about it. And if the rules do say something about it, the rules must apply to everyone not just Trumpers.
We don't have any evidence outside of their word for this. If they can provide evidence of other people having pro-Biden flags or signs on their balcony then they have an actual legal case to bring against the management company. My apartment complex bans all flags and decorations from hanging on the balcony.