The point is to not overdo it so it actually causes them problems down the road.
From the blogs.psychcentral.com
Still, Spagnuolo doesn't want to overdo it with the 6-foot-5, 215-pound rookie.
From the stltoday.com
The only rule is not to overdo it otherwise you'll end up with sugary overkill.
From the dailymail.co.uk
You can easily overdo it if you throw in too much slang and that sort of thing.
From the theatlantic.com
Pouring yourself into your work is admirable, but you are likely to overdo today.
From the fresnobee.com
Be sure to return any overdo emails or calls that deal with a romantic subject.
From the denverpost.com
She was only out in the sun for a few hours, as I didn't want her to overdo it.
From the thisismoney.co.uk
Be sure to not overdo applications, and follow the manufacturer's instructions.
From the washingtonpost.com
Edward warns her not to overdo it and tells her it's just a temporary recovery.
From the en.wikipedia.org
More examples
Do something to an excessive degree; "He overdid it last night when he did 100 pushups"
(Overdoes) Supererogation (Late Lat. supererogatio, payment beyond what is due or asked, from super, beyond, erogare, to pay out, expend, ex, out, rogare, to ask) is the performance of more than is asked for, the action of doing more than duty requires. ...
(Overdoing) Shakalabbits is a Japanese ska punk band. Their members are Uki (vocals), King (bass), Take-C (guitar) and Mah (drums).