Dynamic / PTT talkgoup reminder

Our friend Nathan, K4NWJ from the PRN system recently sent along the following reminder that we can all use.  Consider the impact of your transmission on others, and listen before you transmit.

When you're accessing PRN Chat 1, Chat 2, Tac 1 Tac 310 or 
whatever dynamic tg for the first time, and you need to PTT to 
start up the group, please just a momentary key. It can often 
take up to 45 seconds for you to 'hear' what could be currently
going on in a talkgroup. When you key up a PTT TG (whether repeater 
or hotspot) and give your call, name, and qth, you're very often 
talking over the top of people involved in a conversation. 

I agree, it's tough, you had it beat in to you not to 'kerchunk' a 
repeater, but with DMR just blindly transmitting for a bit on 
your first activation of the TG is usually very disruptive.