If they harass you in DF report them, and let them know your doing it. If it's DF no one should expect anything special from the pt. What you get is what you work with.

If it's pf, and it's your pf, kick them. If it's someone else's.... Well that's up to the. Leader. Being their party, if they want request people to have watched youtibe/know everything before hand them don't join them.