Being rude as in 'joking during a talk at a conference' and even more being rude while being paid for attending (which seems to be the case) said conference mig

Being rude as in 'joking during a talk at a conference' and even more being rude while being paid for attending (which seems to be the case) said conference might not enter into 'freedom of speech'. I a more with the 'honorable behaviour' than with the 'sexist' argument. The fact that you can say whatever you want does not mean you can do so at any time or any place. You can enter into any (judicial) court and shout "I hate the Queen" but then you will probably be expelled from it, despite your very rightful speech.