Thank-you for the suggestion however I feel that doing this would remove interesting strategies involving hiding under the stores/using the underspace as cover, all for the sake of removing a small abuse which is already against server rules. If someone is glitching through the floor feel free to report them to staff so we can deal with them, however I will not be filling in the understore space with concrete blocks since that would just remove a number of strategic gameplay opportunities. I hope you understand my perspective on the issue