but if the GPU's fan still makes that noise, it's important that it's removed ASAP. a malfunctioning/damaged fan on a GPU that's not built into the MOBO must be properly cooled by the heating coils, shell fan and (if applicable) the GPU's fan. the fact that it has a fan means that it generates a hell of a lot of heat, which is enough to break the GPU itself. since a necessary fan for it is malfunctioning, especially the one that's built right into the GPU itself, there's a good chance that it'll bust the GPU, and in turn, might screw up your computer. what commonly happens when a GPU busts up from overheating, is the GPU causing a bad electrical surge that damages or fries your computer's motherboard, making it an even more costly replacement.
if you're going to remove it, always be sure to not wear any cotton, and keep your bare foot touching metal (my usual trick is to grip the metal within the tower with my toes. just try not to touch the cables and components). if your parents are still skeptical on the subject, you can defer them to me since I am a professional with 12 years experience in computer hardware, and you can even give them my website and/or e-mail.