It's not like I'm going out of my way to prevent advertising. Of course I don't cover a logo of my car, but I also don't drive cars on races or other events where I am publicly presenting something. If I were a famous car driver or even running mechanic shop, I would make sure not to show any, eg. tire manufacturer poster unless I have clear financial interest to do so.

But, if I'm presenting something computer related to an audience interesting in computer related stuff, it's perfectly reasonable not to show any unpaid advertising related to computers. I don't want that anyone in the audience get an impression that I recommend any specific laptop brand.

It's quite plausible exactly zero people in your audience ever had that impression.

I wouldn't buy one of those 4WD's with the big TOYOTA lettering on the back. This is comparable to the Apple logo because its going out of its way to be noticed, "look at me, look at me".

Covering up a car's logo with a sticker is obviously not an option, so personally I would avoid those big TOYOTA cars.

Regular car logos aren't so greedy for attention. They don't glow at night, or cover the entire rear panel of the car.

I'm quite surprised that so many people in this industry, and DJs at gigs are happy for the logo to sit there glowing all night on stage. I don't get it, Apple isn't sponsoring your talk or performance.

I guess I'm too optimistic about people caring about keeping a good distance between marketing, capitalism and the expression of ideas and art. To me, those things should remain completely separate.

Actually it's exactly Apple's strategy to have their glowing logo shown around everywhere when people are using them. If you have a Mac and use it in this way you are basically acting as a promoter for the brand whether you like it or not.