Would I violate any copyright laws?

If you take images from someone else, then you are violating that person's copyright, unless you have permission to do so. It doesn't matter if you offer it for free, or ask for donations, or attempt to sell the images. You can only distribute intellectual property if you own the copyright yourself, or if you have permission from the copyright owner. Period.

Also, Tiger Woods has the right to control the use of his own images, IF you took a picture of him yourself, and IF you used that picture as part of a legitimate news story, then you could legally use it. You could not use an image of him, even one that you made yourself, for something like a wallpaper.

Yes you would, unless you obtain the permission of the owner of the copyright for every picture you use.

The Tiger Woods photo that you might find, as an example, was taken by some photographer. That photographer owns the copyright to his picture. You cannot copy it without his permission. That applies whether you use the picture commercially or not.

If you do use it commercially (and "asking for donations" is commercial use.) then you also have to obtain Tigers permission, as he has the legal right to benefit from any "commercial exploitation" of his likeness.

Richard

This is absolutely copyright infringement, no question about it. It's clearly not "fair use" and you can and probably will get sued if you do this. You must have express permission from the copyright owner (which in most cases is the photographer) and probably pay a royalty fee.

A person or company has every right to gain from their creativity. Even if the items are used in a non-profit elements, if the owner has not forfeiture his/her rights they are entailed to full control of their creation