The frum grocery store I shop at covers the images of cereal boxes with white stickers. IMO, that’s going a bit overboard.
If a person has an issue shopping in a goyishe store where there are “forbidden images”, don’t shop there. We don’t run the world, we are only less than 1% of the population. In my most honest opinion (and I am probably wrong here), I believe the best way for someone to deal with such problems is to build a resistance to them. Get used to the fact that you will see an indecent picture of a woman. What do you do? LOOK AWAY! Learn how to deal with it instead of taking the easy way out by covering them.
But what do I know–I’m not a guy so I probably don’t get it.