On the syndicated and network TV shows, every logo that it is possible to cover over is covered unless the owner of that logo pays in some manner for the display of the logo.
Generally, it is not up to the band themselves, it is controlled by the production company. Having said that, there are also a lot of pro musicians who will cover logos themselves if they didn't get at least some sort of discount on the product.
(I feel that way about wearing clothes with logos, unless the clothing was a gift - why should I spend my money for a shirt that promotes someone else's brand).
Jim