Would it be rude for me to ask them to back up?

So I’ve only gone to the store about 3 times since we have been on lock down. Every time I do my best to stay away from people. Every time I get in line no one is 6 feet away from each other. I will get in line and leave a 6ft gap between the person in front of me and then the person behind me will stand right next to me, I’ll scout up a little and they just scout closer. Would it be rude for me to ask them to back up 6ft to keep a distance like we are supposed too?