Yes, it's colluding. And if these colluding players are also sharing card info to make it less risky to shove, which is very likely...well, then you have the perfect poker storm. (Then, also, it's only a matter of time before the site bans them and takes their accounts.)
Most rational players are not going to stay long at a ring table where every hand is a shove fest. So the players there have self-selected; they are all going to be gamblers, and, hopefully, have enough of a
bankroll to do this. Once more than one hand is over $20, the strategy, such as it is, becomes a lot more costly, as the table is no longer a micro table in actuality.
Bottomline, it's stupid, bullying behavior, aside from the collusion. Be even more stupid to sit at that table.
Unless, of course, you just feel like throwing your money away.