I came up in malls in the past. They did but it was also different. You could be a kid there and it was more tolerated. You weren't treated like a suspicious person by default. (Unless you were not white, or a punk. Then security tailed you the whole time.)
Have you been to a mall today? They are still shockingly busy with gaggles of teens roving around.
They are either shockingly busy, or complete ghost towns, depending on how much power the anchor stores had. A lot of malls were kept afloat by the big department stores, and those are doing bad now that those stores are on the ropes. Like, really bad, think "less than 50% occupancy of stores, air conditioning being run at a bare minimum because it's too expensive" bad. Others (notably the ones that Westfield bought after their success with Valley Fair in San Jose) focused more on the "affordable luxuries" segment, with small stores selling specialized stuff, and are doing fine.