[aroberge]

Didn't it occur to you that these slides were for a presentation and that sharing them enable more people than just those that were at the presentation be informed of their content?

I, for one, am very grateful to speakers that make the extra effort required to share with a larger group what they have already shared (or are about to share) with a smaller group.

[alxp]

Much better to turn your notes from the talk into an article than to just throw up the slides.

[koide]

But much harder. Slides (with notes!) are a VERY good compromise.

Remember: the author does not owe you anything.