Those all fall under the "jump straight in" category. If you can read the situation well, e.g. who is up for being approached, and who isn't, then they work well for making new friends. Unfortunately, if you don't yet have those basic social reading skills, it's a minefield.

Incidentally, I'm fully past that set of issues. I used the fact that no one has any idea what's going on at the start of university to practice and build skills.

I also help out with a nerd related social group. Neurodiversity is the heavy majority there. We often have people come along that are accidental shut-ins and want to meet people. I now make a point when showing them around to both make it clear that everyone there at that time is there to socialise and show stuff off. I also introduce them to a few people to break the ice. Watching people come out of their shell and realise they will be celebrated for their weirdness, not punished for it feels very good to me.

I've been on the receiving end of social punishment more than enough to call anyone risking it brave.