Time clocks of any type make me sick. If you can't trust the supervisor and the guys on the job, then you need new people. I have walked out on several interviews when a time clock was mentioned, or I saw one at the office.
However, they do have their place. To keep the employer honest.
I worked at one company, where if you were one minute late, you got what they called an "occurance" Six occurances in one month out you go, even if you worked overtime everyday, and came in on weekends to help out. 450 people on payroll.

Next employer 2000 employees. No time clock. Everyone kept their own time on a time sheet and turned it in twice a month. We even used the same coffee pot, break room and bathrooms as the plant manager. They knew how to make people feel equal.

One more, My wife drove to work one day in terrible winter weather. She was two minutes late. She got a warning. The people that did not show up at all were not penalized at all.

Thanks For Letting Me Vent......John