I do 1-5 day detoxes a couple times a year. I vary the routine depending on what I feel like doing. A typical 5 days would be:
day 1 total fasting
day 2 only fruit
day 3 only veggies
day 4 salmon, nuts
day 5 all of the above plus beans

I think the terms 'cleanse' and 'detox' have definitely been misused in many cases. I don't see anything scammy about the types of detoxes I do. They make me feel great and remind me how much better real, whole food is than processed food.