but they turned out highly effective
Not according to the police Union or the news report. Only 1100 people stopped, and most of those will doubtless travel later.
ordinary workers
Mostly work Mon-Fri. Many like to go shopping for an hour on Sunday, rather than a weekday evening when they're knackered or on Saturday, a day of rest. The PiSflappers' ridiculous ban on Sunday opening was very unpopular. With retail workers too, who appreciate the overtime and/or a day off work.
families
Not everyone lives like that.
playing a defender of common people
No 'playing'...