How about the idea to be able to craft a megaspeaker that needs to be attached to a pole structure, (something like this http://www.uncsa.edu/campuspolice/emergencyimages/speaker-pole-call-box.jpg )
which once built on top of your base or tower you can broadcast whatever you want to say obnoxiously that anyone within a 200 meter radius will hear. The speaker should be really expensive or else everyone will just build one…the equivalent in value to making six c4 in rust legacy?
If you had the ability to craft one would you bother? Broadcasting from one would be asking for trouble, but would be kinda fun too.