Time wasters? Let's see.
I have seen people straggle in 15 minutes late for the meeting for field circus. This disrupts the group, and they have to rearrange things. That wastes more time. Then the phone rings, and someone needs to be picked up.
On the way out, it takes 20 minutes or more to leave. Then we have to pick someone up, who of course is not ready. That can waste another 45 minutes. People have forgotten items like littera-trash, Bibles, and service bags at home or at the Kingdumb Hell. I have seen people have to go home to take their medicine. Then there is getting gas, putting air in the tires, and driving to a station across town to do that. I have also seen people go to the bank and waste half an hour or more there.
In the territory, I have seen quite a few time wasters. Starting from keeping my mouth shut as I see them pass the house or street that they are supposed to be on (they got pxxx when I did that). We walk like turtles to the doors, and half heartedly knock. I would pull a stunt that UPS commonly pulls (leaving before the householder has a chance to get to the door). Then there are the warm up breaks (where I would let the heat out of the car so they would take longer to warm up). I have stood out on calls, paying more attention to the landscaping than to people that I could have placed littera-trash with. And I liked fogging up the windows so they would waste more time clearing them.
Then there are the coffee breaks. We would sometimes go to donut shops or Seven-11. (No, I have yet to see the witlesses go to Starbucks, probably because they are too expensive for the witlesses and they are supposed to put the difference in the Worldwide Pedophile Defense Fund instead of supporting those that work at Starbucks, probably at just above minimum wage). I have seen those Big Mac attacks, too. Of course, I liked it when that happened (even though I never had the Big Mac attack and I do not drink coffee), because I like anything that can disrupt field circus.
Then there are the calls. I liked having them drive across town, take all day to find a street (that I saw right away but kept my mouth shut), and then find the person not at home. Alas, in my congregation, they were very strict about keeping all the calls in one area instead of driving all the way across the territory and sometimes out of the territory and back on isolated calls. Of course, I like it best when someone that was formerly studying goes to an apostate Web site and discontinues the study.