Wow that is lousy trashy behaviour from the 'magician' - no wonder you felt as you did.

You don't need to excuse your reaction to anyone - it is your feelings. The people who responded negatively towards you are certainly lacking in compassion but the internet can do that, sometimes people become 'keyboard warriors'.

I think if you feel able to raise a concern with the venue then you should.

There was a spate of awful abuse cases here in the UK going back to the 1960s/70s/80s and beyond concerning several high profile people in the entertainment industry - they used their positions in order to abuse children/young women. It took many years to come to court/public knowledge but it turned out many people in the industry knew but did not say anything. My point is if we feel uneasy and something does not feel 'right' then we should not brush it off.