I doubt the average tech worker, who doesn't travel in private jets, casually talks about porn actresses and sex workers at their job.
However, I have often heard and read such anecdotes about elite executives, also in non-tech sectors. I'd say that kind of attitude is more related to the impunity that comes with power than with tech or non-tech.
Or, if they do, they look both ways before doing so. The old joke "How does every racist joke start? By looking around" applies pretty handily.
My girlfriend (a Jew) and I crack Jew jokes all the time. . .at home. Even though no one in my workplace is Jewish (that I know of), I still wouldn't crack most of the jokes we use at home in my workplace. It's just not appropriate, not by any reasonable standard.
Maybe the higher up you are the more brazen you can be.
Many in my circle of friends refrain from doing so online in public as well. Never know when someone will take offense to what you've said in the past, smear you with your jokes, and take it to your employer. Better to sanitize your tweets lest you become unemployed.