Can't really keep people from developing relationships in left orgs without becoming culty. You don't even need fun events for comrades to knock boots. I've seen people couple up because they worked on the same project. At the same time, those relationships are a minefield that can destroy the entire org if ensuing drama (or worse) isn't handled appropriately.

IMO a good org does sexual harassment training early and often so that people with bad habits can correct them, and people who don't want to correct them will at least fear repercussions, and those facing negative (or their comrades) attention can be equipped to handle situations deftly and know the org will have their back.

Anyways yeah DSA has that reputation. It's also mostly white dudes, and I think that is both a symptom and a cause, as those facing harassment and not having their concerns taken seriously are less likely to be white dudes.

I think it's good to make an org be one where people are not sexualized by default, they feel safe organizing without that being put on them, and an anti-sexual harassment culture prevails. That's the goal I shoot for.