I witnessed something at DefCon that I think is not uncommon but no less off putting.
The speaker generously offered their time afterwards for an informal chat to those interested. In the circle one individual with a podcast led the question like this:
"I emailed you three times for an interview and never got a reply - should I send a 4th email or am I wasting my time?"
To their credit the speaker did not react and did not commit - but my only thought was - what a jackass. First no-one owes you their time, second have some respect - people don't exist for you to monetize them.
Fortunately this "podcaster" probably won't be around in the next 6months, and neither will they be missed
#defcon34