1.) Not true, I've seen just as many bad ERT's as good ERT's. e.g. ERT was called and killed/captured a wizard and a ninja, while causing minimal damage to station.
Do not use this round as an example, all I saw was two trigger-happy ERTs.
2.) Agreed, this annoys me the most. Either you call ERT or Shuttle not both. Maybe some sort of ingame mechanic that disables shuttlecall for x-time. If you call ERT.
3.) Not true. As Captain I attempt to call ERT for other crisis too, such as above mentioned.
That still doesn't balance out the amount of Heads that call the shuttle over ERT.
4.) Not true again, however yes. Sometimes "harmful" players given weapons(ERT) usually end up bad.
In general I see a higher amount of good ERT, than bad.
During a ling round, an ERT officer decapitated two people who looked the same.
That was me with the SAW. Piece of cake. Plus we killed three. ^^
Like I said, they're only useful in nuclear now.