What can I do to stop this?

[winsock]

I go in knowing there is the possibility that I won't get a good run and that there is a 30 minute penalty in the event I should choose to leave.

That is the full description of the system. And, despite knowing the current state of DF, SE has recently said that they feel the penalty is appropriate and have no plans to change it. What many other people here are doing is applying a layer of white knighting and social-justice-pursuits based on personal biases onto the existing system. Given who their other posting tendencies, I can't say I'm surprised.

We aren't saying you can't, we're just attempting to help you see past any delusions you may have. From a social standpoint, it isnt desirable behavior and is considered selfish, while the OP's behavior is considered acceptable.

Unlike these over righteous people I don't presume to tell someone how to play this game.
....
In the meanwhile, I'll just live and let live and let people enjoy the game how they want to even if sometimes it comes at a slight inconvenience to myself.

^ this is what ppl have a problem with. You certainly are NOT displaying "live and let live" behaviors and you shouldn't kid yourself. You may not be "telling" ppl how to play the game, but you are "forcing" them to play the way you want them to i.e. without a tank, waiting for a tank, or re-queuing altogether. You're negatively impacting the party for personal gain. That is not "Live and Let live"