As always...consult the aircraft manual...stay within the limits stipulated...if that includes 4 people and aerobatics then...yes it is possible!!
As you say...seems like a no brainer to me!
Almost any aircraft is "capable" of performing "aerobatics"...most just aren't capable of recovering (intact) from a botched manouver....sounds too much like Russian Roulette performing aeros in aircraft that aren't certified for the purpose.