Additional to what @Shaun said; #3 Some people would abuse the medic class to open the gates just to help their friends!
Dear @Freezom and @brotherhoodman thank you for applying for Global Trust. You have been ACCEPTED and we welcome you in the Global Trust family! We hope you enjoy the future RP's with us!
Join our discord to receive your Worker role and then we can discuss about further steps.
Ghost722nd,
Chief Executive Officer,
Global Trust.
ᴛʜᴇ ᴇᴀʀᴛʜ ɪs ᴏɴʟʏ ʟᴏᴀɴᴇᴅ ᴛᴏ ᴜs, ʙᴜᴛ ɴᴏ
ᴏɴᴇ sᴀɪᴅ ᴀɴʏᴛʜɪɴɢ ᴀʙᴏᴜᴛ ɢɪᴠɪɴɢ ɪᴛ ʙᴀᴄᴋ
Knows how to make a compromise!
Has applied for Global Trust but I doubt he read Spoiler #1 
(That was a hint to improve it!)
Dear @ZipWyatt thank you for applying for Global Trust. You has been ACCEPTED and we welcome you in the Global Trust family!
Your style of RP is exactly what we need and it's a pleasure for us to see such a great RP player in our rows!
Join our discord to receive your Worker role and then we can discuss about further steps.
Ghost722nd,
Chief Executive Officer,
Global Trust.
ᴛʜᴇ ᴇᴀʀᴛʜ ɪs ᴏɴʟʏ ʟᴏᴀɴᴇᴅ ᴛᴏ ᴜs, ʙᴜᴛ ɴᴏ
ᴏɴᴇ sᴀɪᴅ ᴀɴʏᴛʜɪɴɢ ᴀʙᴏᴜᴛ ɢɪᴠɪɴɢ ɪᴛ ʙᴀᴄᴋ
Dear @hzhayzza thank you for applying for Global Trust. But for now we have to DENY you. Your application doesn't fulfills the requirements. Join us when we do roleplays to gain experience and to see what it means to be in a group like ours. Feel free to reapply in 2 weeks but please make sure that you've read and understood Spoiler #1 on the first page if you still want to join Global Trust!
Ghost722nd,
Chief Executive Officer,
Global Trust.
ᴛʜᴇ ᴇᴀʀᴛʜ ɪs ᴏɴʟʏ ʟᴏᴀɴᴇᴅ ᴛᴏ ᴜs, ʙᴜᴛ ɴᴏ
ᴏɴᴇ sᴀɪᴅ ᴀɴʏᴛʜɪɴɢ ᴀʙᴏᴜᴛ ɢɪᴠɪɴɢ ɪᴛ ʙᴀᴄᴋ
In general yes but it was working in any chat (Local, Vehicle, Group, Global) until the server owner implemented a script which slapped and stopped players from talking in the global chat. Was a mess when the server hadn't installed this kind of script because you had to mute every damn russian one by one! (no offense against russians but they were really annoying!)
Voice Chat worked very well in DayZ and you could easily mute all the russians! Voted Yes!