Using illegality as a standard is stupid if your goal is to protect women from harassment. (If your goal is to allow creepers to get away with this kind of crap, it might serve as a good standard.)
Some of the rest might be rude but not illegal a guy asking a woman to show him her tits.
Sexual harassment,
A man the grabbed a woman's hips in a crowded party seems very situation dependent.
Definitely sexual harassment, possibly sexual assault.
I drunkard attempting to lick a shoulder is in base taste but when have drunkards been in good taste.
Sexual assault.
The only thing listed that fell outside of bounds would be the inappropriate touching.
Sexual assault.
Is it all juvenile behavioral sure, but none of it was sexual harassment that's specifically for workplaces and education that takes federal money.
It may not be legally actionable, but it's sure as shit sexual harassment.
Seems like your putting a lot of socially inept people together people are going to fail miserably at expressing themselves. But requiring a con the standard of the workplace you saying that at neither at work or in social settings may somebody make an unwelcome sexual advance. Do we need special sexual advance zones with trained technical staff and therapists standing by so that one personal can express a desire commit an act that predates our species? Lets face it go to a crowded pickup bar either gender expects some might even hope to have sexual advances made. The unwanted groping is over the line go talk to the cops not the con same as you would do at a bar, mall, or grocery store. Want a horror story's talk to the booth babes at your average trade show, and that is sexual harassment at the workplace.
Why should a woman who wants to go to a hacker convention expect to be subjected to sexual advances? Or, more to the point, why would a man at a hacker convention feel entitled to make sexual advances? After the fact, why do you feel the need to defend men who make sexual advances at a computer hacker convention?