There are protocols and sequences that mush be respected if you don't want to say "DDoS" a repeater frequency or diverge from band plans.
It's really common to have split frequency inputs on repeaters(+/- 600Hz or so on VHF) so even if a channel sounds clear you could be stomping on everything in a 40 mile radius. PL tones mitigate this somewhat but given the sparse, shared aspect of frequency allocations you want people who are properly educated.
It's really common to have split frequency inputs on repeaters(+/- 600Hz or so on VHF) so even if a channel sounds clear you could be stomping on everything in a 40 mile radius. PL tones mitigate this somewhat but given the sparse, shared aspect of frequency allocations you want people who are properly educated.