Villains in this situation were: 12/11, 32/17, 29/18 and BB was 13/6

Currently in a debate with someone whether this is a 3bet or flat because UTG+2 is a 12/11.  If we flat in the SB, BB likely will come in as well putting us OOP to 4 players.

Their arguments were: 

1) we'll likely get reraised or flatted (maybe multiple times) and have to play a larger pot OOP

2) there's no antes so the open raiser likely is narrower than his range suggests

3) flatting will shower a larger profit

My arguments were:

1) first raise in poker means nothing

2) UTG+2 will fold over 50% of his range

3) i don't want to play OOP to 3+ and be guessing if i'm ahead or behind

In the era of re-entry, I can't conceive how this would ever be considered a flat where as in a normal freezeout and smaller buy-in (i.e. more exploitable fields) perhaps flatting might be better.  HU i may flat as well but never against 3+.