There's a large grey area. There are also false accusations.

I agree that social skills can be practiced and learned. But I think something like Toastmasters, improv classes, or Meetup groups are a much safer way, instead of the corporate environment.

Not yet. But there's clearly some trend towards making smaller and smaller transgressions into #metoo issues. I'd hate to find out that I rolled the dice on ostracism (or worse) just to be friendly to someone who doesn't care enough to reach out to me.

In fact, it's much riskier for me to reach out to them than for them to reach out to me. If they're too stupid to realize that, I'm not interested in being their friend. And if they're perceptive of my risk and they still expect me to submit myself to it for their convenience or whatever then I'm not interested in being their friend.