Someone must be bored
To say that the use of a rainbow is anything other than a nice image is a bit mad. someone must have nothing better to do that get themselves noticed and unfortunately this is a nice easy way just mention LGBT and your guaranteed a piece in the news it appears.
The rapsberry pi is not gender or orientation specific it is for everyone, of all abilities and types. Next it will be that your car is racist or your house bricks have an opinion.... get a grip