I’ve heard this attitude before, and my response, once again, is to advise you to 1) deal with it 2) advise you to design a dating app which does not allow non-monogamous people to use it.

Here’s why I completely disagree with everything you’ve said-

1) you are already swiping left for any number of other reasons that you don’t think Bachelor or Bachelorette #2 might not be a match. That’s what the app is for: filtering. Is it really so difficult to add one more criteria to your process?

2) If your preference is that non-monogamous people not disclose their practices (or, non-ethical nonmonogamy, also called “cheating”), you are merely asking for yourself or others in your position to be hurt, in a completely preventable way. Those users would still be every bit as nonmonogamous as they would be if their profile said in. In the open relationship community, it’s considered best practices to disclose your relationship status as soon as possible? So as not to lead on or deceive potential matches.

3) If it’s your argument that nonmonogamous people should stick to their own apps, and not clutter up your feed: that would be nice, but not currently feasible. Some apps, like OKCupid, allow you to filter to only see non-nonmonogamous people, or vice versa. Tinder doesnt offer this option. Others, like Feeld (aka 3nder) cater to nonmonogamous/poly/kinky folks, but have a tiny user base, comparatively.

TL;DR: Swipe left and move on.