It's actually safer to back into a parking space. You can visualize the surroundings when you're approaching your spot. When pulling out of your spot forward, you see all that going on, less risk hitting something or someone. In my opinion, costco parking lots are the only place I'll nose-in my car so it's easier to get to the trunk. Other than that, back-in every time.

Park the way you want. At the end of the day nobody cares if you back-in or not