Having no right NOT to be offended means you're required to be offended. You have a right to be either/or or both, IMO. I don't believe you have the right to tell other people they may not offend you, though. People try all the time, and it just doesn't work. (Especially on the internet, where people may actually be getting their kicks trying to offend you.)

If it's me, bring marshmallows.