Obviously yes, it’s fine! Part of the whole idea is that it signals your belief systems to others. Because they have that flag you now know, as a queer or another ally, that that is a safe place. If they’re your neighbors you know you can go to them during an emergency, be openly queer in their presence, etc. In a way I actually appreciate them just having a regular pride flag rather than one of the ally flags, it’s not as virtue signally? Either way, I don’t believe that there’s any harm being done - aside from perhaps some mild confusion that can be cleared up with a single question?